Forum Discussion
Security between O365, Sharepoint Online, OneDrive and TEAMS
If I change the Site Collection Sharing for https://MYDOMAIN.sharepoint.com (which we currently use as as our main classic sites for now) to NOT allow external sharing, I assume this will NOT affect TEAMS (since it's not in that site collection?) NOR OneDrive, since OneDrive is https://MYDOMAIN-my.sharepoint.com ?
If You want do disable the possibility to share a Site Collection you just go to SharePoint Admin Center. Select https://yourname.sharepoint.com and "click Sharing. There You choose "Dont allow sharing outside your organization".
More detailed info here: https://support.office.com/en-us/article/external-sharing-overview-c8a462eb-0723-4b0b-8d0a-70feafe4be85
That setting disables sharing in OneDrive and TEAMS too which we don't want.
Disabling external sharing for one single site collection should not affect Teams and/or OneDrive.
This is text from the link that i attached in the latest reply.