Disable 'Sync' in SharePoint Document Libraries
Go to the Office 365 settings on the top right corner. Then, select the 'Site settings' option in the drop-down menu.

Scroll down to the Search section, then select ''Search and online availability''

Once in this page, select no in the ''Allow items from this site to be downloaded to offline clients?''

For further information about this or any doubts related to your Microsoft licenses/projects, do no hesitate to contact one of our Microsoft specialists. We are happy to help and available via chat, email, call, or through open tickets in this portal.
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