If your organisation relies on Microsoft 365, continuity planning should not stop at “we use Microsoft 365.” A business impact analysis (BIA) gives you a way to identify the functions that depend on it, assess their criticality and agree on recovery priorities.
Microsoft’s Service Assurance guidance describes four aspects of business continuity planning: assessment, planning, capability validation, and communication and coordination. Its assessment guidance begins with identifying business functions and the services and processes that support them. A BIA then ranks functions by criticality and identifies their dependencies. Microsoft Service Assurance
Start with business functions, not tools
Begin with the work your organisation needs to keep doing. Functions to consider might include customer communications, sales coordination, finance approvals, project collaboration and staff onboarding. For each one, ask which Microsoft 365 services and other processes it depends on. The aim is not to compile a product list; it is to understand what work would be affected by an interruption.
What a BIA is meant to answer
A BIA is more than a technical inventory. Use it to ask:
- Which business function would be affected?
- How critical is it, and how would the impact change over time?
- Which people, processes and services does it depend on?
- Is there a practical workaround?
- What would loss, compromise or delayed access to its data mean?
- Who owns the function and the decision about its recovery priority?
IT can help identify dependencies. The people responsible for each function should explain the business impact and check the assumptions behind its priority.
A simple BIA structure you can use
Microsoft provides a sample BIA table with fields covering the function, its owner, criticality, relevant agreements, data impact, workarounds and approval. You can use those fields as a starting point rather than copying the table exactly. Microsoft Service Assurance
For each function, consider recording:
1. Function and owner. Name the process clearly and identify the business leader who can confirm its importance. “Client proposal approval” is more useful to assess than “documents.”
2. Criticality. Choose classifications your organisation can apply consistently, such as mission critical, important or deferrable. Note why the rating was chosen.
3. Dependencies. Record the particular services and other steps the function relies on. If an approval also depends on a person, supplier or separate system, include that dependency rather than listing only Microsoft 365.
4. Workaround. Describe what staff would do if a dependency were unavailable. Record who could authorise the alternative and whether it has been tried.
5. Data and external impact. Ask what loss or compromise of the associated data would mean. Consider whether an interruption could affect a customer commitment or a sensitive-data obligation; do not assume every function has the same exposure.
6. Recovery expectation. Ask the function owner how long the work could be delayed or performed differently. Treat the answer as a business requirement to compare with the capabilities of the eventual continuity plan, not as a promise that a service will recover within that time.
7. Next validation step. Note how the proposed continuity plan or workaround will be tested and who will review the result. Microsoft treats capability validation as a separate part of continuity planning: the BIA informs priorities, while testing examines whether the response built around them works in practice. Microsoft Service Assurance
For example, an illustrative, not real-world entry could name “proposal approval” as the function, its operations manager as owner and its document-sharing process as a dependency. Its criticality, acceptable delay and workaround would remain to be confirmed by that organisation. The example is a prompt for discussion, not a completed assessment or a Q360 customer case.
Questions that produce useful answers
In a short workshop, ask function owners:
- What work would stop if the relevant service were unavailable for two hours? What about one business day?
- Which people or approvals would be affected?
- What external commitments might be delayed?
- Is there an alternative method staff know how to use?
- Who would authorise that method?
- Which information would be needed first to resume the function?
Record disagreements and unknowns instead of filling them with guesses. A proposed workaround should stay marked as untested until someone checks it.
Who should own the assessment?
Treat the BIA as a collaborative exercise. Depending on the function, invite its business owner, an operations manager, IT and any relevant risk or compliance stakeholder. Ask the owner to confirm the impact and priority. IT can then help examine dependencies and whether the proposed response is feasible. The assessment should make the business decision visible rather than leaving it as an unstated IT assumption.
Turn the assessment into a next step
Review completed entries for shared dependencies, functions with no workable alternative and recovery expectations that need closer examination. Microsoft recommends looking across processes for cascading dependencies, identifying gaps between recovery requirements and supporting capabilities, and planning how to validate continuity arrangements. Microsoft Service Assurance
If you are starting from scratch, try one department or one core process first. Produce a one-page summary of its owner, dependencies, criticality, proposed workaround, recovery expectation and next test. Have the function owner review it, then use what you learn to extend the assessment. The BIA sets priorities; the continuity plans and workarounds developed from it still need to be tested.