Delete Msol groups from csv file

I'm migrating all our distribution Groups that are managed from our on premises exchange server, to O365, but we are having issues with the Sync , so , some groups are not syncing correctly with O365 and are not been deleted. I need to delete then completely to re-create them later.
The only command that seems to work for me now is:
Get-MsolGroup -SearchString "Group Name" | ft *name,objectId
And then copy the object ID and do:
Remove-MsolGroup -ObjectId   xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
I'm trying to use something like the following but is not working:
Import-CSV C:\Path\DGtodelete.csv |ForEach {Get-MsolGroup -SearchString $._Name | select *name,objectId} | Export-Csv C:\Path\objectId.csv -NoTypeInformation       ### it gives me errors
Import-CSV C:\path\DGtodelete.csv | ForEach {Remove-MsolGroup -ObjectId $._ObjectId}        #### also errors
Please , help me to to have this working
Ernesto GallardoAsked:
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It could be the syntax error.. $._ObjectId will give error..  $_.ObjectId should correct it
Import-CSV C:\Path\DGtodelete.csv |ForEach {Get-MsolGroup -SearchString $_.Name | select name,objectId} | Export-Csv C:\Path\objectId.csv -NoTypeInformation

Import-CSV C:\path\DGtodelete.csv | ForEach {Remove-MsolGroup -ObjectId $_.ObjectId}

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Ernesto GallardoAuthor Commented:
Thank you very much for your help. For the first one it worked perfectly , It created the objectId.csv file with the objectId for every DG in DGtodelete.csv. So when i run the second one :

Import-CSV C:\Cygwin\DGtodelete.csv | ForEach {Remove-MsolGroup -ObjectId $_.ObjectId}

 I get this error:

Remove-MsolGroup : Cannot bind parameter 'ObjectId'. Cannot convert value "" to type "System.Guid". Error: "Unrecognized Guid format."
At line:1 char:75
+ ... win\DGtodelete.csv | ForEach {Remove-MsolGroup -ObjectId $_.ObjectId}
+                                                              ~~~~~~~~~~~
    + CategoryInfo          : InvalidArgument: (:) [Remove-MsolGroup], ParameterBindingException
    + FullyQualifiedErrorId : CannotConvertArgumentNoMessage,Microsoft.Online.Administration.Automation.RemoveGroup
 And i don't understand why, it is supposed to be very simple cause if you do it one by one:

Remove-MsolGroup -ObjectId xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx   ...It works fine
 Any thoughts,
Thanks again
If the input csv file displays correct GUID then try..
Import-CSV C:\path\DGtodelete.csv | ForEach {$GUID = [GUID]$_.ObjectId ; Remove-MsolGroup -ObjectId $GUID}

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Ernesto GallardoAuthor Commented:
Ohh Yes, it worked perfectly. Thank you so much for your help.  the only thing was change the file name to objectId.csv  ..
Thanks again
Ernesto GallardoAuthor Commented:
You have just saved me a lot of time and effort
You are welcome!, Don't forget to close the question! :-)
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