How long does it take for SharePoint Online permissions to take effect?
When I add a user to an Active Directory Group that already has permissions to the document library, it takes a long time (1-2 hours) for the user to gain access to the document library.
How do I add a user to SharePoint permissions?
On the Permissions tab, click Grant Permissions. In the Share dialog, type the name of the SharePoint group that you want to give access to. By default, the Share dialog displays the message Invite people to Edit or Invite people with Can edit permissions. This grants permissions in the SharePoint Members group.
Why are group permissions not updated in SharePoint?
This may due to the fact that Sharepoint imports the group membership information from Active Directory on a regular basis. the Frequency depends on configuration of your User Profile Synchronization service in central Admin. Profile synchronization is described nicely here: http://technet.microsoft.com/en-us/library/gg188041.aspx#groups
How to limit external sharing in Microsoft SharePoint?
Select Limit external sharing to specific security groups. Under Who can share outside your organization, note the security groups listed for Let only users in selected security groups share with authenticated external users and using anonymous links. You need to add the user to one of the listed security groups.
How to manage SharePoint groups in Microsoft 365?
On the Groups page of the Microsoft 365 admin center, find the group you want to edit. Select the group, and then on the Members tab, select View all and manage members.
How do I add permissions to my mailbox?
On the Mail tab, select Manage mailbox permissions. Next to Send on behalf, select Edit. Select Add permissions, then choose the name of the user or users that you want to allow to send email on behalf of this mailbox.