Hi @Daniel Carrillo,
Thank you for posting to Microsoft Community.
Based on your description, I understand there are a pop-up issue with your Outlook client.
Please kindly try to create a new profile as steps of Create an Outlook profile - Microsoft Support and check if the error still occurs.
Also, you could clear cache as the following steps to see if it could be solved.
- Navigate to the location below: C:\Users_yourusername_\AppData\Local\Microsoft
- Cut the OneAuth and IdentityCache folders out of the Microsoft folder and paste it to somewhere else like your desktop.
- Relaunch Outlook and sign in.
- If the issue is still there, close Outlook and copy the OneAuth and IdentityCache folders back into the Microsoft folder mentioned above but select NO when you are asked if you want to overwrite.
If these mailboxes are in the cloud, please Download Microsoft Support and Recovery Assistant from Official Microsoft Download Center and try to fix the issue.
Hope it helps and if there are anything else you need help, please feel free to contact me.