Error Code CAA90049

Question

Error Code CAA90049

Samuel Th 40

Hello, a few people in my company suddenly run into a Login problem with Office 365
the Problem is they login via Azure Acc at every 365 App doenst matter which one if excel or word or anything else, yes they have a Licence for 365 Business Premium, and they are either logged in until they close this app. and then they have to login again when they open the 365 App again.
Or it asked if Microsoft should remember this Useraccount for Logins and then this error message accurs (see Screenshot)
It looks like a kinda new Problem since i cant find much about this error Code.

Dillon Silzer 60,836 Reputation points Volunteer Moderator

2024-04-23T17:13:13.63+00:00

I don't see a screenshot attached. Please add one.
HarryB 30 Reputation points

2024-04-23T20:21:46.1366667+00:00
Anonymous

2024-04-29T15:48:01.41+00:00

I'm also having the same problem. It just started happening last week with two users. Not one else has reported it so far. No much information about it on the web. Hopefully someone can guide us here.
Raul Yunikzi Cervera 0 Reputation points

2024-04-30T16:43:09.1933333+00:00

I'm also having the same problem, with only my user but it still any time I try to Login onedrive iven if I uninstall onedrive an reinstall.
Dario Bonini 1 Reputation point

2024-05-09T17:13:01.0766667+00:00

HI,

I also have the same problem.

I can confirm that the problem only occurs when installing the March or April update.

(have horizon in the company, all PCs / images that are not updated DO NOT have the problem).

I did several tests without success.

do you know if there are solutions?
Anonymous

2024-05-24T06:30:44.8366667+00:00

We have a user with the same symptoms, so far Support hasn't found the root cause. Impacts access to Outlook / Office 365 apps and other Azure linked applications like Visual Studio.
DavidRhoads-6714 0 Reputation points

2024-05-30T17:29:43.8233333+00:00

We're having the same issue; I've only seen this in our Citrix VMs. Seems like you can click through the error and sign in anyway, but it's very confusing for users.
Monique 5 Reputation points

2025-01-10T15:17:05.4566667+00:00

I am having the same issue, and my administrator does not know what to do. Please post a step-by-step solution to this error code.
Mohamed Amor Al Harthi 0 Reputation points

2025-05-06T12:28:09.92+00:00

Folow this steps

issue

If you have both the classic and new versions of Teams installed on same VDI or PC, error CAA90049

follow these steps to fix it:

Uninstall the Old Version:

Click the Start menu.

Type "Teams" in the search bar.

I Teams apps, right-click each one and choose Uninstall.

Make sure classic Teams (work or school) is removed.

Open the Teams App:

Click on "Open new Teams" or "Try the new Teams" (if prompted).

This will switch or update you to the new version.

After doing this, the issue with duplicate Teams apps Error Code CAA90049 should be resolved.

1 answer

Your answer

Dillon Silzer 60,836 Reputation points Volunteer Moderator

2024-04-23T17:13:13.63+00:00

I don't see a screenshot attached. Please add one.
HarryB 30 Reputation points

2024-04-23T20:21:46.1366667+00:00
Anonymous

2024-04-29T15:48:01.41+00:00

I'm also having the same problem. It just started happening last week with two users. Not one else has reported it so far. No much information about it on the web. Hopefully someone can guide us here.
Raul Yunikzi Cervera 0 Reputation points

2024-04-30T16:43:09.1933333+00:00

I'm also having the same problem, with only my user but it still any time I try to Login onedrive iven if I uninstall onedrive an reinstall.
Dario Bonini 1 Reputation point

2024-05-09T17:13:01.0766667+00:00

HI,

I also have the same problem.

I can confirm that the problem only occurs when installing the March or April update.

(have horizon in the company, all PCs / images that are not updated DO NOT have the problem).

I did several tests without success.

do you know if there are solutions?
Anonymous

2024-05-24T06:30:44.8366667+00:00

We have a user with the same symptoms, so far Support hasn't found the root cause. Impacts access to Outlook / Office 365 apps and other Azure linked applications like Visual Studio.
DavidRhoads-6714 0 Reputation points

2024-05-30T17:29:43.8233333+00:00

We're having the same issue; I've only seen this in our Citrix VMs. Seems like you can click through the error and sign in anyway, but it's very confusing for users.
Monique 5 Reputation points

2025-01-10T15:17:05.4566667+00:00

I am having the same issue, and my administrator does not know what to do. Please post a step-by-step solution to this error code.
Mohamed Amor Al Harthi 0 Reputation points

2025-05-06T12:28:09.92+00:00

Folow this steps

issue

If you have both the classic and new versions of Teams installed on same VDI or PC, error CAA90049

follow these steps to fix it:

Uninstall the Old Version:

Click the Start menu.

Type "Teams" in the search bar.

I Teams apps, right-click each one and choose Uninstall.

Make sure classic Teams (work or school) is removed.

Open the Teams App:

Click on "Open new Teams" or "Try the new Teams" (if prompted).

This will switch or update you to the new version.

After doing this, the issue with duplicate Teams apps Error Code CAA90049 should be resolved.

Answer 1

Mohamed Amor Al Harthi 0

Folow this steps

issue

If you have both the classic and new versions of Teams installed on same VDI or PC, error CAA90049

follow these steps to fix it:

Uninstall the Old Version:

Click the Start menu.

Type "Teams" in the search bar.

I Teams apps, right-click each one and choose Uninstall.

Make sure classic Teams (work or school) is removed.

Open the Teams App:

Click on "Open new Teams" or "Try the new Teams" (if prompted).

This will switch or update you to the new version.

After doing this, the issue with duplicate Teams apps Error Code CAA90049 should be resolved.

DavidRhoads-6714 0 Reputation points

2025-05-08T20:19:56.3933333+00:00

We only have new teams on our VDI base image and we're still getting this error.

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Error Code CAA90049

1 answer

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