Check If Connected to SPOService in Script

When executing SharePoint Online scripts you need to be connected to your “admin” site or the script will just fail if you’re not.

When writing a script you can’t assume that you’re already connected to your SPO tenant and unlike the “msolservice” connect call you need to specify your “admin” URL which can be quite long. But sometimes you’re already connected in the Powershell session.

Writing this little thing in the start of your script will check if you’re connected to the admin site and if not will call the connect-sposervice command with the URL already set.

# First we reset the sitecheck to avoid having an old result
# This is the address of your SPO admin site
$adminurl = "https://[your tenant name]"
# Now we try to get the SPOSITE info for the admin site
Try { $sitecheck = get-sposite $adminurl }
# If we get this server exception for any reason, the service isn't available and we need to take action, in this case
# write it to the console and then connect to the SPO service.
Catch [Microsoft.SharePoint.Client.ServerException]
Write-Host -foreground Yellow "You are not connected!"
connect-sposervice $adminurl

Manage External Sharing in SharePoint Online

You’re managing a SharePoint Online environment and you want to know where external sharing is enabled.

The problem is that Microsoft hasn’t fully launched a way of getting a good overview of this where you can change it. When you first enable sharing for example alot of sites will have it turned on by default etc. The new SharePoint Admin center has the ability to add the “external sharing on/off” column in the list of sites but that is very limited and you can’t enable or disabled it.

Fortunately there is a very good attribute that you can retrive to get this and alter the external sharing setting called “SharingCapability”.
So using that you can get a list of all sites and what the status is of them, or you can filter for all that have it enabled or disabled:

get-sposite | select url, SharingCapability												# All sites with their URL and SharingCapability
get-sposite | Where-Object{$_.SharingCapability -eq "ExternalUserSharingOnly"}			# External user sharing (share by email) is enabled, but guest link sharing is disabled.
get-sposite | Where-Object{$_.SharingCapability -eq "ExistingExternalUserSharingOnly"}	# External user sharing to existing Azure AD Guest users
get-sposite | Where-Object{$_.SharingCapability -eq "ExternalUserAndGuestSharing"}		# External user sharing (share by email) and guest link sharing are both enabled
get-sposite | Where-Object{$_.SharingCapability -eq "Disabled"} 						# External user sharing disabled

Once you have that you can script it so you can disabled external sharing on all sites by doing this:

$allsites = get-sposite | Where-Object{$_.SharingCapability -ne "Disabled"}
foreach($specificsite in $allsites) { Set-SPOSite $specificsite.url -SharingCapability Disabled }

The reason you want to do this in a “foreach” is there will be a site or two you may get an error that you can’t change the setting, so that would exit the command on that error.