Audit Core SaaS Dependencies in 60 Minutes
Treat each core SaaS dependency as a single point of failure, then build the fallback and customer message before the outage, not during it.
Every SaaS company runs on a stack of tools that feel invisible until they stop. The inbox that carries sales conversations. The calendar that keeps support from colliding. The shared drive where the only copy of a customer contract lives. When one of those tools fails, the problem is not the tool. The problem is that the company had no second path.
A widespread, multi-hour Outlook outage caused email delays and failures, authentication issues, and other problems. The outage was widespread, and Downdetector showed a sharp spike in Outlook problem reports. The outage extended beyond Exchange Online to other Microsoft 365 services, including OneDrive for Business, SharePoint Online, Teams, Purview, and Defender XDR.
This is vendor risk in its ugliest form: the system that runs the company becomes the thing that stops the company. For an early-stage SaaS team, the damage is rarely the outage itself. It is the scramble that follows. Sales stops sending the right message. Support stops seeing the customer. Operations stops knowing what is true. The vendor may fix the service, but your team still has to explain the gap, recover the work, and decide what changes so the next failure is less painful.
The audit you can finish in one sitting
You do not need a full business continuity program. You need a short list, a few owners, and a message that is already written. The goal is not to eliminate the dependency. The goal is to make the dependency survivable.
- List the dependencies that would hurt customers if they stopped. Include email, calendar, CRM, support inbox, billing, file storage, identity, and any internal app that touches revenue or support. Do not list every app. List the ones whose failure would force you to explain how you are doing it without them.
- Score each by customer impact and recovery time. Customer impact asks what the customer sees. Recovery time asks how long your team can keep working before the workaround becomes a mess. A tool with low customer impact and a fast workaround can sit lower on the list. A tool that blocks sales, support, or billing gets top priority.
- Define the fallback workflow and assign one owner. The fallback should be boring: a shared channel, a phone tree, a manual log, a secondary inbox, a local file path, or a status note. The owner should be the person who can make the switch without asking for permission. If the fallback requires three people to remember it, it is not a fallback.
- Pre-draft the customer incident comms. The message should say what is affected, what you are doing, and when the next update will come. Keep it short enough to send from a phone. Do not wait for a perfect explanation. A clear, early message is worth more than a polished one that arrives late.
- Set a 15-minute trigger for escalation and status updates. Then update on a fixed rhythm until the issue is closed. The trigger should be short enough to protect customers and long enough to avoid noise.
What the playbook changes
The value of the audit is not that it prevents the outage. It does not. The value is that it changes the first few minutes from a guessing game into a sequence. Someone knows what is down. Someone knows who owns the workaround. Someone knows what the customer hears. That is the difference between an incident and an incident that becomes a trust problem.
Core SaaS dependencies are not optional. They are the operating system of the company. But an operating system can fail, and a company should not need a miracle to keep serving customers. Build the fallback before the outage. Write the message before the panic. Assign the owner before the blame. When the next outage comes, your job is not to invent a plan. It is to run one.
