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Add claims based secondary site collection admin Sharepoint 2013

Claims based authentication for application is working and i can add claims to sharepoint group, but can i configure claims secondary site admin. I have tried but gives me error that it can't find user, see the attached screenshot.
2016-09-09-10_31_15-Clipboard.jpg
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oompaloompa
Asked:
oompaloompa
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1 Solution
 
Walter CurtisSharePoint AEDCommented:
Grant User Site Admin Privileges
The following PowerShell code can be used to promote a user to be a site administrator for a site collection. This should be run in the context of an account that has permission for this change.

$Web = Get-SPWeb http://webapp.com/sites/users-site
$User - Get-SPUser -Web $Web -identity "i:05.t|saml provider|username@webapp.com"
$User.IsSiteAdmin=$true
$User.update()

Here are few other checks that can be run to assist the process:
After getting the web object with Get-SPWeb, check the claim string by using $Web.SiteUser with a filter, as shown here:

$Web.SiteUsers | ?{$_.UserLogin -like "*username*"} | ft -a

The results of that query shows the string which can be used in the Get-SPUser cmdlet. (Copy and paste save some typing and can be more accurate.)

It is also possible to confirm that the user is a site admin by using this line in the appropriate location:

$User.IsSIteAdmin

(Results will be true of false.)


Hope that helps...
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oompaloompaAuthor Commented:
User doesn't exists in SP, it is not a domain user so i can't resolve it, i get returned claims for the user

"Get-SPUser : You must specify a valid user object or user identity.
At line:1 char:9"

2016-09-10-09_23_48-.png
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Walter CurtisSharePoint AEDCommented:
If the user is not in SharePoint, then you cannot add as a site admin. If the user is not a member of the domain, unless you have some type of authentication mechanism for the user, you can't add to SharePoint.

What you want to do may not be possible to do.

Good luck...
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oompaloompaAuthor Commented:
i have authentication mechanism outside of sharepoint, users are redirected to authenticate and then redirected back to sharepoint.

So there is no way to add secondary site collection admin based on claims that i got returned from third party sts ?
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Walter CurtisSharePoint AEDCommented:
Yes, if SharePoint sees it as a user when it comes from the third party sts, you can do anything you want with it in SharePoint. If it is not seen as a user then you can't do anything with it. If powershell can't find it, then maybe it is not being passed from the sts provider correctly or as you think it is. Make sure you are using the same user name and claims string that the sts provider is passing.

Good luck...
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Walter CurtisSharePoint AEDCommented:
Any luck?
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Walter CurtisSharePoint AEDCommented:
Thanks
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