SharePoint admins can reduce external sharing risk without blanket bans
Reviewed by Helen Jones
On 28 September 2026, SharePoint Maven published six alternatives to disabling external sharing across an entire tenant. The options are to control sharing site by site, restrict partner domains, limit who may share through a security group, choose safer default link types and permissions, expire links, and train users. Microsoft’s current documentation confirms that these controls can be applied at organisation or site level, subject to the more restrictive setting.
A tenant-wide block can look like the safest answer, but it removes the approved collaboration route as well as the risky one. People may then fall back to email attachments or personal storage, creating less visibility rather than less exposure. Layered controls let a small admin team narrow where sharing is allowed, who can initiate it, which partners are acceptable, and how long access lasts. The trade-off is operational: somebody still needs to review guests and links, help site owners choose the right setting, and remove access that is no longer justified.
Analysis
Choose one site that genuinely needs partner collaboration and pilot a narrower policy: approved domains, named sharers, a specific-people view link by default, and an expiry period. Review its guests and links after the pilot before applying the pattern elsewhere.
Source note
Pulse published by Collab365 Spaces, reviewed by Helen Jones on . Cite as "SharePoint admins can reduce external sharing risk without blanket bans", Collab365 Spaces. 1 source referenced.