Microsoft Outlook node error

Describe the problem/error/question

Hi all,
Has anyone been experiencing issues with the Microsoft Outlook node credentials recently?
Since last week, our workflows intermittently fail unless we manually switch the credential used by the Outlook node. We created a new Microsoft OAuth credential and it worked for a few days, then started throwing authentication errors again. Switching back to the old credential temporarily fixes it, but only for a short time before the same issue returns.
It feels like the token or refresh process isn’t being handled consistently, but nothing has changed on our side.
Is anyone else seeing this behaviour? And is there a known fix or workaround?
Thanks!

What is the error message (if any)?

Method not allowed - please check you are using the right HTTP method

Please share your workflow


Take a look at this thread….I think there is an issue that happens 12/1, every two years with Outlook node authentication. Recreating credentials fixed in our environment

Microsoft Outlook Client authentication failed - Questions - n8n Community

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