Set-PnPListItem: The specified user could not be found.

[iFestral]

Hi,
For some reason, I cannot update a list item with multiple values with a variable.
I have columns with Person or Group types; for groups, it contains Allow selection of Groups.
It works as expected manually but not with the PnP module.

Trying to use an array variable with groups where a user is a member:

$groups = "grp.user.dev.system_terraform|devops","grp.user.product_and_market|management"

Set-PnPListItem -List $sharepoint_list_name -Id $ListItemUpdate.ID -Values @{"Groups" = $groups}

Getting the error: Set-PnPListItem: The specified user could not be found.
PS tried to create New-PnPGroup for each.

When I'm using copy/paste data from the variable and put it into the value, everything works.

Set-PnPListItem -List $sharepoint_list_name -Id $ListItemUpdate.ID -Values @{"Groups" = "grp.user.dev.system_terraform|devops","grp.user.product_and_market|management"}

Any suggestions will be appreciated.

[AndersRask]

I think this is a known issue. It seems to work on lists but not on document libraries.

I added a Group field that allowed multiple values, and if i use Set-PnPListItem on a doclib it always only add the first item (no matter if i define an array in a variable or directly typing the values. If i do the exact same process on a List it works fine...

# both set only add first group
Set-PnPListItem -List "Documents" -Values @{"Groups" = "Everyone except external users","Test Members"} -Identity 1
$values = @("Everyone except external users","Test Members")
Set-PnPListItem -List "Documents" -Values @{"Groups" = $values} -Identity 1

# on a list it adds both
Set-PnPListItem -List "TestList" -Values @{"Groups" = $values} -Identity 1

[An-kun]

I have had this issue for 3-4 years, just dropped it last I had a bit of need for it.
Retried it today and the same issue appear, except its not for document library, it is with sharepoint lists.
I generally work around it with the pnpuser's id in a variable. It works like 99/100 times, then you hit a specific item with a specific user and it just doesnt work. "The specified user could not be found."

Worth noting is that the issue only appears with variables.
Set-PnPListItem -List "Documents" -Values @("Everyone except external users","Test Members") <-- works fine

$values = @("Everyone except external users","Test Members")
Set-PnPListItem -List "Documents" -Values $values <-- does not work

But like i mentioned, only with some list items and some users. Have experienced this in 2 different tenants before, but only have access to one now.