unable to add users to group

Question

Hi Experts

I have mail enabled security group in exchange online. i am trying to add few users using the below syntax.

Import-csv C:\data.csv | ForEach {Add-DistributionGroupMember -Identity group@Company portal .com -Member $_.users}

I am getting the below error. I am Global Admin and i dont have mailbox for my account.

You don't have sufficient permissions. This operation can only be performed by a manager of the group.
+ CategoryInfo : NotSpecified: (:) [Add-DistributionGroupMember], OperationRequiresGroupManagerException
+ FullyQualifiedErrorId : [Server=NJ1PT01RT7328,RequestId=ght56789-1234-458o-309j-26789456789f1,TimeStamp=3/19/2021
5:26:47 AM] [FailureCategory=Cmdlet-OperationRequiresGroupManagerException] D7689533,Microsoft.Exchange.Managemen
t.RecipientTasks.AddDistributionGroupMember
+ PSComputerName : outlook.office365.com

Answer 1

Hi @Glenn Maxwell ,
You could also run the following command to check whether your account defined in Manageby properties:

Get-DistributionGroup | ft Name, ManagedBy -AutoSize  

If there is not, please run the following command to add your account.

Set-DistributionGroup SG1 -ManagedBy @{Add="<value1>", "<value2>", …} -BypassSecurityGroupManagerCheck  

The following Microsoft KB article described a similar issue, you may have a look at it to know more details: (You don't have sufficient permissions) error when you try to remove or make a change to a distribution group

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Answer 2

Use the -BypassSecurityGroupManagerCheck switch:

Import-csv C:\data.csv | ForEach {Add-DistributionGroupMember -Identity group@contoso.com -Member $_.users -BypassSecurityGroupManagerCheck }