Utilisation d’Outlook classique sur Windows pour la messagerie personnelle, le calendrier et la gestion des contacts
Hi enrique, have you tried to free up Microsoft Storage for attachments?
Click the “Outlook (Attachments)” link in the storage settings.
Save any needed attachments to your computer and delete the emails or attachments from the account.
Don’t forget to empty Deleted Items and Recoverable Items to truly release the space.
Wait ~10 minutes, refresh the storage page, and test sending an email.
Also free up mailbox space,
Delete large or unnecessary emails in your inbox, sent items, drafts, and archive folders.
On web: use Sweep, or sort by size to locate large emails quickly.
Then empty Deleted Items and recoverable trash.
Best regards,
Kimberly