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--- playground:microsoft_365:exchange_online:office_365_tenant_to_tenant_migrations [2021/10/29 22:53] – [Distribution Group Migrations] admintomi
+++ playground:microsoft_365:exchange_online:office_365_tenant_to_tenant_migrations [2021/10/29 23:16] (current) – [Distribution Group Migrations] admintomi
@@ Line 13: / Line 13: @@
 </code>
-Exporting distribution lists members
+And importing distribution lists. If importing another tenant, remember to clean onmicrosoft.com aliases and rename domains if needed.
+<code>
+Import-Csv C:\temp\distribution_list_export.csv | foreach {
+$proxyaddresses = $_.EmailAddresses -split ' '
+$managers = $_.ManagedBy -split ' '
+New-DistributionGroup -Name $_.DisplayName -ManagedBy $managers -PrimarySmtpAddress $_.PrimarySmtpAddress -RequireSenderAuthenticationEnabled $_.RequireSenderAuthenticationEnabled -WhatIf
+Set-DistributionGroup -Identity $_.DisplayName -EmailAddresses @{add= $proxyaddresses} -WhatIf
+}
+</code>
+Exporting distribution lists members. I borrowed this from Internet. Problem is that this script does not output nice .csv file, needs to be redesigned.
 <code>
@@ Line 32: / Line 44: @@
 </code>
+Lets say you add headers to file produced on previous script for example "DisplayName,PrimarySMTPAddress,User,UserPrimarySMTP,Mailboxtype" (Add first line on file)
+You can import members to new tenant with following command
+<code>
+Import-Csv C:\temp\distributiongroup_importmembers.csv | foreach {
+Add-DistributionGroupMember -Identity $_.DisplayName -Member $_.UserPrimarySMTP
+}
+</code>
+Yet again pay attention to UPN if it needs to be changed before importing.