Forum Discussion
Connect-SPOService : Could not authenticate to SharePoint Online
Passing the -Credentials parameter bypasses ADAL (i.e. switches to legacy auth), so you seem to have some issue with ADAL/Modern authentication. Do you get the ADAL dialog when you run the first cmdlet?
I do not get the ADAL dialog at all when using connect-sposervice from powershell, but i do get the ADAL window when running Connect-MsolService from the same powershell window on the same machine and i am able to connect to azure ad.
The error message i am getting instead of expected login dialog window is:
PS C:\WINDOWS\system32> Connect-SPOService -Url https://tenantname-admin.sharepoint
.com
Connect-SPOService : Unable to cast object of type
'Microsoft.IdentityModel.Clients.ActiveDirectory.Internal.InteractiveWebUI' to
type 'Microsoft.IdentityModel.Clients.ActiveDirectory.Internal.IWebUI'.
At line:1 char:1
+ Connect-SPOService -Url https://tenantname-admin.sharepoint.com
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Connect-SPOService], InvalidC
astException
+ FullyQualifiedErrorId : System.InvalidCastException,Microsoft.Online.Sha
rePoint.PowerShell.ConnectSPOService
If i include -Credential parameter, it is not succeeding with federated account, only with cloud only account i am able to login to SPO.
I'd say reinstall the module.
If i install the module to fresh machine, i am getting the login window and i am able to authenticate and connect to SPO, if i logoff from that machine and login using different user, i am not getting the login window and cannot connect to SPO, this behavior is consitent in my envrionment on all machines i tested, i tested with azure ad module for win powershell and cannot reproduce that behavior, i do not have more time to troubleshoot this, so i am happy it can work for me (if i install and use the sp mgmt shell using the same user account), but looks like some bug in the sp mgmt module, if anyone else is experiencing this or has a solution please let me know, thanks
I faced the similar problem.
We do have MFA enabled and for me I got the popup for credentials but did not asked me for MFA code.
below is what I got.
Connect-SPOService : Could not authenticate to SharePoint Online
https://site/ using OAuth 2.0
At line:1 char:1
+ Connect-SPOService https://site/
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Connect-SPOService], Authenti
cationException
+ FullyQualifiedErrorId : Microsoft.Online.SharePoint.PowerShell.Authentic
ationException,Microsoft.Online.SharePoint.PowerShell.ConnectSPOService
