Hello, I have a remote end user that is receiving this error code when trying to sign into any M365 app. Once we close the error message the apps work perfectly fine but this happens daily when signing on and I would like to find a permanent fix. I would attach a screenshot but that doesn't seem to be working right now. User enters login credentials and Microsoft authenticator code then this error pops up for any m365 app / teams / OneDrive. User is in another state so can't come into office. Something went wrong We couldn't sign you in. If this error persists, contact your system administrators and provide the error code CAA90049. Error code: CAA90049 Correlation ID: 9a55***1d07 Server message: Session key is empty Any help is appreciated. Thank you [PII is removed by moderator]

Hello, Any news from anybody about this. Today is the first time it happened to one of my users and can't get her through it. I cleared the activation status and license on her endpoint but still getting the same error. EntraID sees it as a successful sign in.

Have you found a solution for this, we have a user with this exact problem and would also like to remedy the issue.

Same Issue need solution quickly Microsoft

I also need to find a solution for this. I have a user in our environment with this exact same issue.

Did anyone find a solution to this issue?

Error code CAA90049 - Any M365 App

Anonymous

Hello, I have a remote end user that is receiving this error code when trying to sign into any M365 app. Once we close the error message the apps work perfectly fine but this happens daily when signing on and I would like to find a permanent fix. I would attach a screenshot but that doesn't seem to be working right now.

User enters login credentials and Microsoft authenticator code then this error pops up for any m365 app / teams / OneDrive.
User is in another state so can't come into office.

Something went wrong

We couldn't sign you in. If this error persists, contact your system administrators and provide the error code CAA90049.

Error code: CAA90049

Correlation ID: 9a55***1d07

Server message: Session key is empty

Any help is appreciated.

Thank you

[PII is removed by moderator]

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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67 answers

Anonymous

2024-05-06T17:28:18+00:00

Hello,

Any news from anybody about this. Today is the first time it happened to one of my users and can't get her through it. I cleared the activation status and license on her endpoint but still getting the same error. EntraID sees it as a successful sign in.
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Anonymous

2024-05-02T15:31:57+00:00

Have you found a solution for this, we have a user with this exact problem and would also like to remedy the issue.
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Anonymous

2024-04-30T08:41:38+00:00

Same Issue need solution quickly Microsoft
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2 people found this answer helpful.

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Anonymous

2024-04-29T21:50:46+00:00

I also need to find a solution for this. I have a user in our environment with this exact same issue.
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2 people found this answer helpful.

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Anonymous

2024-04-23T20:18:34+00:00

Did anyone find a solution to this issue?
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5 people found this answer helpful.

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