Hey! Great follow-up question — this is an important distinction.
“Everyone Except External Users” — Does it work for Power Automate?
Short answer: Yes, in most cases it should work — with one important caveat.
What “Everyone Except External Users” actually means
Per Microsoft Learn’s Default SharePoint groups, “Everyone except external users” is a special SharePoint group that automatically includes all internal users in your organization (anyone with a licensed Microsoft 365 account in your tenant). So as long as the account used to authenticate the Power Automate SharePoint connector is an internal organizational account, it is already a member of this group and therefore has Read access at the site level.
The catch — connector authentication is per-user
Even though the group grants broad internal access, the Power Automate SharePoint connector still authenticates as a specific named user account (whoever set up the connection). Per Use SharePoint and Power Automate to build workflows, SharePoint performs its own permission checks when flows access lists and libraries. That means:
- If your account is an internal org account and the library/list hasn’t had unique permissions applied — “Everyone except external users” access will be sufficient.
- If the specific list or library has unique (broken) permissions that exclude “Everyone except external users,” you’ll still get an error. Site-level access doesn’t automatically cascade down when unique permissions exist.
- If your org’s Conditional Access policies (MFA, device compliance) apply to the flow, those can also block access regardless of group membership.
Recommendation
Try authenticating your connector with your internal account — if the site truly has “Everyone except external users” with no unique library permissions, it should work. If you still see errors, check whether the specific library or list has unique permissions that override site-level access, or ask the site owner to confirm there are no exclusions.
References:
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Raghav Mishra — LinkedIn | PowerAI Labs