Single user getting 503s when we make a POST to

Chris 5 Reputation points


I'm working on a user report for our product that they are unable to create a subscription for their calendar. In our backend we're making a POST to , and it is returning a 503. We have a significant number of users that are able to perform this operation, yet every time this user tries we get a 503. According to the the docs, this should only happen because of a capacity issue and we should try again, but every attempt for this user gives us a 503.

I'm not sure what to do from here. We can ask them to keep trying, but it seems like something else is going on. Are there user-specific reasons why this endpoint might return a 503, and how can we prevent it?


Microsoft Graph
Microsoft Graph
A Microsoft programmability model that exposes REST APIs and client libraries to access data on Microsoft 365 services.
11,411 questions
{count} vote