70-345 Exam Guide: Designing and Deploying Microsoft Exchange Server 2016
Exam 70-345, Designing and Deploying Microsoft Exchange Server 2016, was built for experienced Exchange professionals who design messaging environments, lead deployments, and make decisions about availability, storage, recovery, and integration. Microsoft’s objective document described a minimum of three years designing and managing Exchange servers in an enterprise Exchange 2016 environment. This guide helps you make the important first decision: whether to pursue this legacy exam if an official registration path still exists, or redirect your preparation toward the current Microsoft role-based messaging route.
What did 70-345 validate?
70-345 validated the ability to design and deploy an enterprise Exchange Server 2016 environment rather than merely perform routine mailbox administration. Its objectives centered on architecture, high availability, storage, recovery, and integration decisions that affect service continuity and operational risk.
The intended candidate profile
Microsoft targeted IT consultants and senior administrators serving as the technical lead for a team of administrators. The objective document also specified familiarity with integrating Exchange Server with Skype for Business and Office 365, so the intended audience extended beyond an isolated on-premises Exchange operator.
Microsoft specified a minimum of three years of experience designing and managing Exchange servers in an enterprise Exchange 2016 messaging environment. Treat that as an official experience expectation, not as a formal prerequisite that a scheduling system necessarily verifies. If your experience is limited to user provisioning, basic transport rules, or help-desk troubleshooting, this exam’s design emphasis indicates a substantial preparation gap.
The practical decision for a current candidate
Before investing in study materials, verify whether 70-345 can still be scheduled through the current Microsoft certification catalog. Microsoft’s role-based mapping guidance identifies newer role-based certifications as replacements for the older 70-xxx model, and Microsoft’s retirement guidance says retired exams cannot be taken or used to earn the associated credential after retirement.
The historical transition route associated with 70-345 was MS-202, the Microsoft 365 Messaging Administrator Certification Transition Exam. Microsoft stated that MS-202 retired on September 30, 2019. That transition route is therefore not a current scheduling option. Check the official Microsoft certification pages rather than relying on third-party listings that may continue to display the old exam number.
Useful sources for this decision are Microsoft’s role-based mapping article and its exam-retirement guidance: https://learn.microsoft.com/en-us/credentials/certifications/posts/mapping-microsoft-70-xxx-exams-to-new-role-based-certifications and https://learn.microsoft.com/en-us/credentials/support/retired-certification-exams.
Which technical skills deserve the most attention?
Study the exam as a set of connected engineering decisions: how Exchange stores data, how it remains available during failures, how it recovers within business targets, and how it fits with adjacent collaboration services. The published objective changes became effective on November 10, 2017, so use the objective document as a historical scope reference rather than assuming it reflects current Microsoft cloud products.
Mailbox database design and operations
Mailbox database planning, deployment, management, and troubleshooting represented 15–20% of the measured skills. The associated domain included storage architecture, JetStress validation, database capacity and placement, transaction-log configuration, and virtualization scenarios.
Do not study these subjects as separate definitions. Build a design chain: identify workload and failure requirements, select a storage architecture, estimate capacity, decide database and log placement, validate the design, and then test how the choices behave under operational pressure. For every design, record the reason a choice helps performance, recoverability, or maintainability.
A common mistake is treating database placement as a simple drive-letter exercise. A stronger preparation method asks what happens when a volume fills, a log stream grows unexpectedly, a database copy becomes unhealthy, or a virtualized host fails. Your notes should connect the configuration choice to the failure mode it is intended to control.
High availability and site resilience
The objectives included planning and managing high-availability solutions using Database Availability Groups, DAG networks, file-share witnesses, mailbox database copies, and Azure DAG members. They also included site-resilient DAG configuration, quorum planning, Datacenter Activation Coordination, alternate file-share witnesses, and site recovery testing.
Practice by drawing the environment before naming settings. Mark mailbox servers, database copies, network paths, witness locations, and sites. Then work through loss of a server, loss of a network path, loss of a site, and restoration of the failed component. For each event, state what remains available, what quorum requires, and what an administrator must verify before returning service to normal.
Do not reduce DAG preparation to memorizing terminology. The exam’s design orientation makes the relationship between topology, quorum, activation behavior, and recovery testing more important than isolated command recall. If you cannot explain why a witness belongs in a particular location or how an alternate witness supports site recovery, revisit the architecture.
Backup, recovery, and business requirements
Backup and recovery planning covered recovery point objectives and recovery time objectives, lagged database copies, and recovery of Exchange servers, databases, mailboxes, public folders, and items. Prepare to translate business requirements into a recovery design, not simply list backup features.
Create a recovery matrix with a business requirement in one column and the corresponding Exchange recovery method in another. Include the system or data scope, the acceptable data loss, the expected restoration urgency, dependencies, and the validation step. Keep server recovery, database recovery, mailbox recovery, public-folder recovery, and item recovery distinct; they are not interchangeable outcomes.
A frequent preparation error is assuming that a healthy replica eliminates the need for a tested recovery plan. Replication and backup address different risks. Your study notes should explain when a lagged database copy is useful, what recovery point and recovery time objectives imply, and how a recovery test proves that the documented plan works.
Exchange integration
Microsoft’s objective document specified that candidates should be familiar with integrating Exchange Server with Skype for Business and Office 365. Prepare to reason about dependencies, identity, mail flow, coexistence, and operational ownership when Exchange participates in a wider communications environment.
Use an integration worksheet rather than a product-feature list. For each integration scenario, document the purpose, required connectivity, identity assumptions, mail-flow implications, administrative boundary, and failure considerations. Then explain which component you would troubleshoot first when a user can sign in but cannot use the expected messaging or collaboration function.
Avoid spending all your time on Exchange internals while ignoring adjacent services. The integration objective signals that a senior designer must understand the boundary between Exchange and connected Microsoft services, even when the exact implementation detail is not an Exchange mailbox setting.
How should you prepare without relying on dumps?
Use the official objectives to build a gap-driven plan, then confirm each topic through documentation, diagrams, and hands-on reasoning. Practice questions can expose weak areas, but leaked questions or memorized answer sets cannot demonstrate design competence and do not guarantee a passing result.
Start with a diagnostic pass through every objective. Mark each item as explain, configure, troubleshoot, or design. “Explain” means you can describe the purpose and trade-off; “configure” means you can identify the implementation sequence; “troubleshoot” means you can isolate a fault; “design” means you can defend a solution against stated constraints.
Use Microsoft Learn’s preparation guidance to locate study guides, self-paced modules, exam-preparation videos where available, instructor-led training, and Practice Assessments where available: https://learn.microsoft.com/en-us/credentials/certifications/prepare-exam. Because 70-345 is a legacy exam, do not assume that every current preparation feature exists for it. Treat a resource as useful only after confirming that it maps to the Exchange 2016 objectives.
Build a lab around decisions
A productive lab should let you test storage placement, database copies, DAG behavior, witnesses, recovery procedures, and integration assumptions. The goal is not to reproduce every enterprise dependency; it is to create small scenarios in which you can observe the consequence of a design choice.
Keep a lab journal containing the initial architecture, the requirement being addressed, the change made, the observed result, and the rollback or recovery action. Include diagrams and failure scripts. If you cannot operate a full lab, use architecture exercises and documented procedures, but label knowledge gained from reading separately from skills verified through execution.
Do not confuse successful installation with readiness. A deployment lab becomes valuable when you deliberately test an unhealthy copy, a missing witness, a capacity assumption, a recovery objective, or a site-level failure. Write down what evidence would convince you that the service had recovered correctly.
Turn objectives into scenario questions
Rewrite each objective as a constraint-based scenario. For example: a business requires a particular recovery point and recovery time, a site may become unavailable, storage must be validated, and administrators need a tested path to restore a database or mailbox. Then compare two possible designs and defend one.
For every scenario, ask five questions: What is the requirement? What component or topology addresses it? What could still fail? How would you validate the design? What operational action follows the failure? This method trains the reasoning needed for consultant and technical-lead work more effectively than copying terminology into flashcards.
When reviewing an answer, distinguish a technically possible choice from the best choice under the stated constraints. A design may work in a laboratory yet fail the recovery objective, create an avoidable quorum risk, or make capacity management impractical.
Use assessments as feedback, not evidence of readiness
A Practice Assessment is most useful when every missed response leads to an objective review and a hands-on or written explanation. Microsoft says some Practice Assessments are free, delivered through Microsoft Learn, and available in multiple languages; availability and language coverage should be confirmed for the specific exam.
Do not judge readiness from one high result. Track recurring errors by domain: database architecture, DAG and site resilience, recovery planning, or integration. For each error, write why the selected option was unsuitable and what fact or requirement would change the decision.
Microsoft also notes that an exam may not be available in the same languages as its Practice Assessment. Confirm the actual exam language and availability through the official scheduling path if the legacy exam appears in the catalog.
What is a practical study roadmap?
A staged roadmap prevents you from beginning with obscure commands before understanding the architecture. Move from objective mapping to core design, then failure analysis, recovery validation, and final decision practice. The order matters because storage, availability, and recovery choices influence one another.
In the first stage, establish whether the exam is schedulable and download or review the official objective material. Create a checklist with the exact areas: mailbox databases, DAGs, site resilience, recovery, and integrations. Record your current evidence for each skill and identify the areas where you have only theoretical familiarity.
In the second stage, study mailbox database design and high availability together. Draw storage and DAG topologies, place copies and witnesses, explain quorum, and test the effect of server, network, and site failures. Validate that your design supports the stated capacity and recovery assumptions rather than accepting a diagram because it looks symmetrical.
In the third stage, concentrate on recovery. Write procedures for the different recovery scopes named in the objectives, map them to recovery point and recovery time requirements, and include verification. Add lagged-copy decisions and site recovery testing. A recovery procedure without a validation step is incomplete preparation.
In the final stage, use scenario reviews and any available official assessment resources to expose gaps. Revisit only the objectives behind your errors, explain each design choice aloud or in writing, and complete a final readiness check based on capability rather than familiarity with answer wording.
A useful weekly study rhythm
Set one technical outcome for each study session: produce a storage design, explain a quorum decision, execute or document a recovery test, or troubleshoot a database-copy issue. End the session with a short review of what evidence supports your conclusion and what remains uncertain.
Alternate passive and active work. Read the objective and relevant documentation, then draw the topology, write the procedure, perform the lab action, or critique a design. This alternating pattern reveals whether you understand the subject or have merely recognized its vocabulary.
Reserve a review session for cross-domain scenarios. Ask how a storage decision affects recovery, how a site-resilient DAG affects quorum, and how an integration dependency changes an outage plan. The exam objectives are more useful when treated as an interdependent architecture than as unrelated study chapters.
How to know when a topic is ready
A topic is ready when you can explain its purpose, identify the relevant constraints, choose an implementation approach, predict a failure consequence, and describe validation. If you can only define a feature or repeat a configuration sequence, continue studying.
Use a three-part evidence record for each objective: a concise explanation, a diagram or procedure, and a failure or recovery scenario. This record gives you something concrete to review during the final phase and exposes gaps that broad confidence statements conceal.
Do not schedule solely because you have completed a training playlist. Schedule when your weakest objective has a defensible explanation and your recovery and availability decisions remain coherent when the scenario changes.
What mistakes waste preparation time?
The most damaging mistakes are strategic: preparing for a current cloud exam while assuming the legacy objectives remain current, memorizing product terms without designing a solution, and ignoring recovery testing. Correct these before adding more study material.
Mistake one is trusting a third-party page as proof that the exam is available. DumpsArena and other catalogue pages can help you recognize the exam number, but only Microsoft’s current certification and scheduling systems can establish whether registration is possible. If no official path appears, stop treating 70-345 as a schedulable target.
Mistake two is studying only the 15–20% mailbox database domain because it has a published weight. Mailbox database planning, deployment, management, and troubleshooting is explicitly associated with that percentage; the percentage does not describe DAGs, recovery, or integration, and it should not be reused as a comparison with unlabeled domains.
Mistake three is memorizing witness and quorum vocabulary without placing those components in a site-resilient design. Draw the failure scenario and explain the activation and recovery implications. A candidate who cannot defend the placement decision has not finished the topic.
Mistake four is treating backups, lagged copies, and database copies as synonyms. The objectives distinguish these recovery concepts and name different recovery targets. Build a matrix that keeps the protection mechanism, recovery scope, acceptable data loss, and restoration process separate.
Mistake five is ignoring the stated experience level. If you lack enterprise Exchange 2016 design exposure, compensate with a structured lab, architecture reviews, and written failure analysis rather than assuming that a short review of terms will close the gap.
Mistake six is using exam dumps as a substitute for learning. Dumps may contain unauthorized or inaccurate material, and memorizing reported answers does not establish that you can design, deploy, troubleshoot, or recover an Exchange environment. Use legitimate objectives, documentation, training, and scenario practice instead.
How do you verify registration and delivery details?
Verify availability first, then follow Microsoft’s scheduling workflow from the relevant certification or exam detail page. Do not infer current delivery, language, pricing, or retirement status from an old 70-345 listing or from historical transition announcements.
Microsoft’s registration guidance says candidates begin from a certification overview or exam details page, select the exam provider, and may be prompted to sign in or create a Learn Profile. If the legacy exam is listed, follow the displayed provider instructions and ensure the legal name on the profile matches the legal identification requirements described by the provider.
For Pearson VUE scheduling, Microsoft states that a maximum of two Microsoft Certification exams can be scheduled at a time, effective January 16, 2023, and that exams can be scheduled no more than 90 days in advance. That policy is tied to Pearson VUE; Microsoft notes that scheduling through Certiport is not changed by it.
Microsoft’s general guidance says many exams offer an online or test-center choice, but an online option may not appear for every provider or exam. For an online appointment, run the provider’s system pre-check and confirm the testing-area requirements. A test center may be the more practical choice if your equipment or environment cannot reliably satisfy the checks.
Request any needed accommodation before scheduling so the provider has time to review it. Confirm language, provider, appointment availability, rescheduling rules, and any current fee directly in the official booking flow because these details can vary and the supplied historical sources do not establish current 70-345 availability or pricing.
Registration instructions: https://learn.microsoft.com/en-us/credentials/certifications/register-schedule-exam.
Should you pursue a newer messaging certification instead?
For most current candidates, the first action should be comparing the work represented by 70-345 with Microsoft’s current role-based messaging pathway. Microsoft described 70-345 as a predecessor associated with the Microsoft 365 Messaging Administrator transition route, while later mapping guidance places older 70-xxx exams within the move to role-based certifications.
If your goal is a current Microsoft credential, start with the official certification catalog and identify the active messaging certification and its current exams. Then compare its skills measured with your job responsibilities, especially cloud administration, identity, compliance, mail flow, and hybrid operations where relevant. Do not assume that passing or studying a legacy Exchange 2016 exam automatically grants a current certification.
If your employer specifically requires historical Exchange Server 2016 knowledge, the 70-345 objectives can still serve as a useful technical study outline, subject to the availability and rights to use the underlying products and documentation. If your objective is a current transcript credential, do not schedule or purchase study material until Microsoft confirms the active route.
Microsoft’s mapping article is the appropriate starting point for understanding the historical transition from 70-xxx exams to role-based certifications: https://learn.microsoft.com/en-us/credentials/certifications/posts/mapping-microsoft-70-xxx-exams-to-new-role-based-certifications.
What should you do next?
Take three actions in order: check the official catalog for a live 70-345 registration path, map the published objectives against your experience, and choose either a legacy Exchange design study plan or a current role-based messaging exam. This sequence prevents wasted effort and keeps the credential decision separate from the technical learning decision.
If registration is available, use the objective document to create a gap list, begin with mailbox database architecture and DAG design, and then work through recovery and integration scenarios. Schedule only after you can defend designs and recovery actions without relying on recalled answer patterns.
If registration is unavailable, retain the 70-345 objectives as historical Exchange 2016 architecture material and redirect certification preparation to the current Microsoft role-based path. Microsoft’s retirement guidance explains that retired exams cannot be taken or used to earn the associated credential, while already-earned certifications remain on a candidate’s transcript.
The objective changes document is the best source for the technical scope preserved in this guide: https://download.microsoft.com/download/8/C/3/8C3706A8-24D0-42D7-9227-15BD675291C7/345_OD_Changes.pdf.
subsections
Conclusion
70-345 is best understood as a legacy Exchange Server 2016 architecture and deployment exam for senior practitioners, not as a generic mailbox-administration test. Its preparation value lies in connecting storage, DAG and site resilience, quorum, recovery objectives, and service integration into defensible designs. Confirm the exam’s official status before scheduling; if it is no longer available, use the same technical gap analysis to select the current role-based messaging certification instead of relying on outdated listings or dumps.
