Hi today we are discussing on a topic of Errors CAA2000B, 4usqa, and 49dvs when trying to sign in to classic Outlook and Outlook for Mac. As we all know that Microsoft mentioned many Outlook errors and it always solved by Microsoft.
In an organization Outlook is the most used application to communicate officially through emails. Recently Microsoft announced they identified an error Errors CAA2000B, 4usqa, and 49dvs when trying to sign in to classic Outlook and Outlook for Mac.
These errors commonly usually happen because of problems with logging in, verifying your identity, or following your company’s security rules. Outlook Errors CAA2000B is the error that always happen when you sign into Outlook. These errors might be happen when the service principal for the Microsoft Information Protection API was turned off.
Otherwise if any changes or something went wrong with that this error will happen. Even though the codes might look hard to understand, they usually point to problems with how you’re logging in, how your device connects to Microsoft servers, or how your Outlook is set up.
Table of Contents
How to Fix CAA2000B 4usqa and 49dvs Sign-In Errors in Outlook and Outlook for Mac
Above we disacussed an ooverall things about the Errors CAA2000B, 4usqa, and 49dvs in Classic Outlook and Outlook for Mac. When trying to sign in to classic Outlook or Outlook for Mac, some users might come across confusing error codes like CAA2000B, 4usqa, or 49dvs.
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Error 4usqa
This error code not common happening in the Outlook, when this happens users dont know what to do. In this error indicate that Access denied for the resource. It usually means Outlook is having trouble connecting to Microsoft’s servers.
This can happen if your internet is have no network or failed to connect, your network settings are off, or if something like your firewall or antivirus is blocking the connection.
| Error Details | Info |
|---|---|
| Correlation Id | def6fdee-defb-463a-bbf3-3d6e5ad69477 |
| Timestamp | 2025-05-13T13:25:06.000Z |
| DPTI | 955b773b0ab950fddf18002511c2fd0f524301707fbc486273105 |
| Message | Access denied for the resource. |
| Tag | 4usqa |
| Code | 3399614475 |
Error CAA2000B
This errors are commonly happen in the Outlooks, this usually means something went wrong when you tried to sign in to Outlook. It might happen if your Outlook app is outdated or your saved login info is wrong. When we get the Error message it Indicate that AADSTS500014 code in the server message and it means AADSTS500014: The service principal for the resource is disabled.
- The AADSTS500014 error usually means that the app or service you’re trying to use has been turned off or is no longer allowed to sign in by your organization’s admin.
| Error Details | Info |
|---|---|
| Error code: | CAA2000 |
| Corelation ID | 3819156c-1eul -< 36f-8el3-5u50970a1904 |
| Temestamp | 2025-05-1311306002 |
| More information | https//www.microsof.com/wamerrors |
| Server message | AADSTS500014: The service principal for resouece �- within the tenant has lapsed, or that the administrnor for this tenant has disabled the agplication, preventing token fom being issued for it Brace ID: bo674801-eb8b-487e brse-52435etr7800 Comelation ID: 381956c-Teaf-436-Bel3-9a1090a19d4 Timestan 2025-05-13 13:06:002 |
49dvs
If you get the 49dvs error, it means Outlook is having trouble confirming your ID. That means some time when we login we get messages like your account is really you? like that that indicates the 2 step verifications is not working properly. To fix it, try signing in again using a web browser, or check your security settings to make sure everything is up to date and working.
Workaround For the Error
Microsoft find out some workaround for this issues, this always happen because of the Microsoft Information Protection API being disabled. So we have to take care of that. First you have to log into the Microsoft Entra and Navigate thtrogh Application> Enterprise Application > All application.
- In the Alll application you have to search for the Searching for “Information Protection” or using the ID 40775b29-2688-46b6-a3b5-b256bd04df9f.
- Then Clicking on the Microsoft Information Protection API in the results.
- Changing the setting called Enabled for users to sign-in to Yes.
- Then clicking on the Save.
If anything solved this issue Contact your system administrator and provide the error code!
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Reference
Errors CAA2000B, 4usqa, and 49dvs when trying to sign in to classic Outlook and Outlook for Mac
Author
Anoop C Nair has been a Microsoft MVP for 10 consecutive years from 2015 onwards. He is a Workplace Solution Architect with more than 22+ years of experience in Workplace technologies. He is a Blogger, Speaker, and Local User Group Community leader. His primary focus is on Device Management technologies like SCCM and Intune. He writes about technologies like Intune, SCCM, Windows, Cloud PC, Windows, Entra, Microsoft Security, Career, etc.