How to disable download option of sharepoint for the guest in office 365

Question

I have a question about the permission of guest user on SharePoint in Office365 (package business basic)/ We have a group chat on the Microsoft team. We share documents there and have some guest users from other organizations access to read the document. We need to block the download option with guest users. They just have permission to read the documents. Please, give me your answer. I am looking forward to heard information from you.

Answer 1

You can assign a Conditional access policy to the site corresponding to said Team. Here's a sample article: https://learn.microsoft.com/en-us/sharepoint/control-access-from-unmanaged-devices?redirectSourcePath=%252farticle%252fControl-access-from-unmanaged-devices-5ae550c4-bd20-4257-847b-5c20fb053622
Alternatively you can consider protecting the site with AIP label.