OneDriveforBusiness - unable to share w/ tenant colleagues but able to share with external contacts

Hi Renato_Pereira,

here are a few potential reasons why you might encounter difficulties when trying to share files with colleagues within the same tenant:

1. Sharing limits:
   It's possible that there's a restriction on the number of people you can share with simultaneously.
2. Account validation:
   Microsoft may need to validate your account.
3. OneDrive status:
   Ensure that OneDrive is functioning properly.
4. Organization restrictions:
   Your organization might have implemented restrictions or disabled sharing.
5. License issues:
   Verify if the user has the required SharePoint and OneDrive licenses.
6. External sharing settings:
   There could be an issue with the external sharing settings of your SharePoint or OneDrive sites.

Unable to share OneDrive files - Microsoft Support