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np123's avatar
np123
Copper Contributor
Nov 17, 2025

Update Dynamic Distribution List

we are a hybrid environment, running exchange 2019 and have a few DDLs which have been around from previous exchange versions. One of the DDLs i need to modify is the below. Its hard to read and i am trying to work out where i add the extra fields i want to include. I am looking to add another custom attribute and possibly include members of a security group. Is there anyway to make this easier to read so i know where to add things? Any other tips?

 

((((((((((((((((((((((((((Company -eq 'Contoso') -and (CustomAttribute4 -eq 'City'))) -and (((((CustomAttribute7 -eq 'Group') -or (CustomAttribute7 -eq 'Contractor'))) -or (CustomAttribute7 -eq 'Permanent'))))) -and (((RecipientType -eq 'UserMailbox') -or (((RecipientType -eq 'MailUser') -and (CustomAttribute12 -ne 'Excluded'))))))) -and (-not(Name -like 'SystemMailbox{*')))) -and (-not(Name -like 'CAS_{*')))) -and (-not(RecipientTypeDetailsValue -eq 'MailboxPlan')))) -and (-not(RecipientTypeDetailsValue -eq 'DiscoveryMailbox')))) -and (-not(RecipientTypeDetailsValue -eq 'PublicFolderMailbox')))) -and (-not(RecipientTypeDetailsValue -eq 'ArbitrationMailbox')))) -and (-not(RecipientTypeDetailsValue -eq 'AuditLogMailbox')))) -and (-not(RecipientTypeDetailsValue -eq 'AuxAuditLogMailbox')))) -and (-not(RecipientTypeDetailsValue -eq 'SupervisoryReviewPolicyMailbox')))) -and (-not(Name -like 'SystemMailbox{*')) -and (-not(Name -like 'CAS_{*')) -and (-not(RecipientTypeDetailsValue -eq 'MailboxPlan')) -and (-not(RecipientTypeDetailsValue -eq 'DiscoveryMailbox')) -and (-not(RecipientTypeDetailsValue -eq 'PublicFolderMailbox')) -and (-not(RecipientTypeDetailsValue -eq 'ArbitrationMailbox')) -and (-not(RecipientTypeDetailsValue -eq 'AuditLogMailbox')) -and (-not(RecipientTypeDetailsValue -eq 'AuxAuditLogMailbox')) -and (-not(RecipientTypeDetailsValue -eq 'SupervisoryReviewPolicyMailbox')))

 

2016
Exchange Server
hybrid

2 Replies

  • np123's avatar
    np123
    Copper Contributor
    Nov 23, 2025

    ok, thanks. So in terms of running the command, co-pilot told me the below command would work (i havent tested it as its an important DDL). Do you think this will work or not go with including what will be added back? 

     

    Set-DynamicDistributionGroup -Identity "Your-DDG-Name" -RecipientFilter "(
    (
        (((((((((((((((((((((((Company -eq 'Contoso') -and (CustomAttribute4 -eq 'City')) -and 
        ((CustomAttribute7 -eq 'Group') -or (CustomAttribute7 -eq 'Contractor') -or (CustomAttribute7 -eq 'Permanent'))) -and 
        ((RecipientType -eq 'UserMailbox') -or ((RecipientType -eq 'MailUser') -and (CustomAttribute12 -ne 'Excluded')))) -and 
        (-not(Name -like 'SystemMailbox{'))) -and (-not(Name -like 'CAS_{'))) -and 
        (-not(RecipientTypeDetailsValue -eq 'MailboxPlan'))) -and 
        (-not(RecipientTypeDetailsValue -eq 'DiscoveryMailbox'))) -and 
        (-not(RecipientTypeDetailsValue -eq 'PublicFolderMailbox'))) -and 
        (-not(RecipientTypeDetailsValue -eq 'ArbitrationMailbox'))) -and 
        (-not(RecipientTypeDetailsValue -eq 'AuditLogMailbox'))) -and 
        (-not(RecipientTypeDetailsValue -eq 'AuxAuditLogMailbox'))) -and 
        (-not(RecipientTypeDetailsValue -eq 'SupervisoryReviewPolicyMailbox'))
    ) -and 
    (-not(Name -like 'SystemMailbox{'))) -and 
    (-not(Name -like 'CAS_{'))) -and 
    (-not(RecipientTypeDetailsValue -eq 'MailboxPlan')) -and 
    (-not(RecipientTypeDetailsValue -eq 'DiscoveryMailbox')) -and 
    (-not(RecipientTypeDetailsValue -eq 'PublicFolderMailbox')) -and 
    (-not(RecipientTypeDetailsValue -eq 'ArbitrationMailbox')) -and 
    (-not(RecipientTypeDetailsValue -eq 'AuditLogMailbox')) -and 
    (-not(RecipientTypeDetailsValue -eq 'AuxAuditLogMailbox')) -and 
    (-not(RecipientTypeDetailsValue -eq 'SupervisoryReviewPolicyMailbox'))
) -or (CustomAttribute3 -eq 'test')"

     

  • VasilMichev's avatar
    VasilMichev
    MVP
    Nov 18, 2025

    You can ignore anything after this bit:

    ((((((((((((((((((((((((((Company -eq 'Contoso') -and (CustomAttribute4 -eq 'City'))) -and (((((CustomAttribute7 -eq 'Group') -or (CustomAttribute7 -eq 'Contractor'))) -or (CustomAttribute7 -eq 'Permanent'))))) -and (((RecipientType -eq 'UserMailbox') -or (((RecipientType -eq 'MailUser') -and (CustomAttribute12 -ne 'Excluded')))))))

    as it will be added back after you make the changes. For the above, cleanup the parenthesis, and make sure the correct grouping is used between the individual clauses, then append another -or with the desired changes.

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