This is a recurrent one mostly coming from experienced SharePoint Admins that see their configured security settings are not persisted over night. Scenario: You have created a modern team site in SharePoint. As a SharePoint Admin you go into the site permissions and add “Everyone but external users” claim to the group members. Later on… Read more
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It may happen from time to time to stumble upon weird GUID accounts in your logs. They will resemble something like <guid>@00000003-0000-0ff1-ce00-000000000000. For those of you that haven’t published an app/ set-up a S2S trust relationship, well, never seen this , here is the explanation. From https://docs.microsoft.com/en-us/sharepoint/dev/sp-add-ins/create-and-use-access-tokens-in-provider-hosted-high-trust-sharepoint-add-ins “The audience principal for a SharePoint Add-in is always 00000003-0000-0ff1-ce00-000000000000″ This… Read more