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]

We are encountering this issue as well in a VDI environment.

We do have a VDI environment for our users with office shared computer activation. After 9 April the uses have to login in Office applications and after activate the users will have to register device for MAM end get this error. Are there any solution for this issue?

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.

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.

0 comments

67 answers

Anonymous

2024-06-12T20:05:07+00:00

We are encountering this issue as well in a VDI environment.
Was this answer helpful?

0 comments No comments
Anonymous

2024-05-28T08:26:03+00:00

We do have a VDI environment for our users with office shared computer activation. After 9 April the uses have to login in Office applications and after activate the users will have to register device for MAM end get this error. Are there any solution for this issue?
Was this answer helpful?

0 comments No comments
Deleted

This answer has been deleted due to a violation of our Code of Conduct. The answer was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.

Comments have been turned off. Learn more
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.
Was this answer helpful?

0 comments No comments
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.
Was this answer helpful?

0 comments No comments