If your community bank or credit union runs email, document storage, collaboration, identity management, security monitoring, and backup all through Microsoft, your examiner has a question for you: what happens if Microsoft has a sustained outage or a material security event?
In 2026, vendor concentration risk has moved from the periphery of IT examination conversations to the center. Examiners are asking tougher questions about what happens when a single vendor fails or becomes prohibitively expensive. And "we use Microsoft for everything because it is easier to manage" is not a defensible answer.
Vendor concentration is one of those risk management decisions. And "we use Microsoft for everything because it is easier to manage" is not a defensible answer.
What examiners are looking for
Examiners want to see that your institution has identified its critical vendor dependencies, assessed the risks of concentration, documented a rationale for the architecture you chose, and considered alternatives or mitigations. They are not demanding that you stop using Microsoft. They are demanding that you thought about it.
A documented back-out plan is part of that answer. If your primary SaaS provider experiences sustained failure, or if pricing becomes untenable (Microsoft 365 E3 licenses doubled from $25 to $50 per user), what is your institution's contingency? Can your data be restored to an alternative platform? Is your identity layer independent of your collaboration vendor?
If the answers are "we have not thought about that" or "we would figure it out," your examiner will write a finding.
How to build the answer before the question
Separate your identity layer from your collaboration platform. An identity provider like Okta works with Microsoft 365, Google Workspace, and virtually every cloud service your institution uses. If Microsoft goes down, your authentication infrastructure stays up. If you ever need to migrate collaboration to another platform, your identity does not have to move with it.
Use cross-platform backup. Veeam can back up your Microsoft 365 data and restore it to a different environment. Immutable backups that your primary vendor cannot access or modify are also a ransomware defense. Two problems solved with one architectural decision.
Deploy cross-platform security monitoring. A SumoLogic-based security operations center pulls telemetry from Microsoft 365, from your internal network, from your other SaaS services, and from your on-premises systems. Your security visibility does not depend on one vendor's security stack.
Document everything. Map each vendor dependency, the risk it creates, and the mitigation you put in place. This documentation is the artifact your examiner will ask for.
The conversation you want to have
When your examiner asks about vendor concentration, the answer you want to give is: "We identified this risk. We separated our identity, security, and backup layers from our collaboration vendor specifically to mitigate concentration risk. Here is the documentation showing our rationale, our architecture, and our back-out plan."
The FFIEC examination shift you need to know about
Two changes in 2025-2026 made vendor concentration risk more visible to examiners.
The FFIEC retired its Cybersecurity Assessment Tool (CAT) in August 2025. The CAT was a structured self-assessment that many institutions used to prepare for examinations. Its retirement means institutions must now justify their chosen cybersecurity framework and demonstrate that it is right-sized for their specific risk profile. Most institutions are adopting the NIST Cybersecurity Framework 2.0, which explicitly addresses supply chain and vendor risk in ways the old CAT did not.
The OCC's Bulletin 2025-24, effective January 2026, eliminated mandatory policy-based examination in favor of a risk-proportionate model. In practice, this means examiners now focus on whether your risk management decisions are documented and defensible, not whether you have a specific policy document on a shelf. A well-documented decision to separate your identity, backup, and security layers from your collaboration vendor is exactly the kind of risk management decision this new model is designed to evaluate.
The institutions that will come through their next cycle with clean findings are the ones that made these architectural decisions before the examiner asked about them. The institutions that scramble to answer during the examination will receive findings.
What this costs
Separating your identity, backup, and security from your collaboration vendor is not a massive capital project. It is a series of targeted decisions, each of which strengthens your architecture while addressing a specific risk. An Okta deployment for a community bank can be implemented in weeks. Veeam backup configuration takes days. SumoLogic integration can happen alongside your existing security tools.
The cost of these additions is modest compared to the cost of an examination finding, which triggers remediation requirements, follow-up scrutiny, and board-level reporting obligations.
A practical action plan for the next 90 days
If your institution has not addressed vendor concentration risk yet, here is a concrete sequence for the next quarter:
Week one through two: Inventory every service that depends on Microsoft (or your primary SaaS vendor). Email, file storage, collaboration, identity, security monitoring, backup, device management. Map the dependency chain: if this vendor went down for 72 hours, which services would be affected and what would the impact be on your operations?
Week three through four: Evaluate independent identity options. Okta has a specific offering for financial institutions. The deployment can run alongside your existing identity platform during the transition. Get a pricing proposal and a timeline estimate.
Week five through six: Evaluate cross-platform backup. Veeam can be deployed for Microsoft 365 backup within days. The cost is modest and the value is immediate: immutable backup that also gives you cross-platform restore capability.
Week seven through eight: Engage your security team on cross-platform monitoring options. If your current security monitoring only sees Microsoft traffic, you have a visibility gap that examiners will eventually ask about.
Week nine through twelve: Document everything. Write up the risk assessment, the architectural decisions, the vendor evaluations, and the implementation plan. This documentation is the artifact your examiner will ask for, and having it ready before they ask demonstrates proactive risk management.
That is a conversation your examiner will approve of. And it is a conversation CTP can help you prepare for.