It looks so easy here: http://technet.microsoft.com/en-us/library/bb684908(EXCHG.80).aspx Of course, when I try to do it (for something else, granted), it doesn't work: [PS] C:\>$DDG = Get-DynamicDistributionGroup | where {$_.Name -like "*class*"} [PS] C:\>$DDG Name ---- #Class of 2011 #Class of 2012 #Class of 2013 #Class of 2014 #Class of 2015 [PS] C:\>$DDG.AcceptMessagesOnlyFrom += "John Doe" Property 'AcceptMessagesOnlyFrom' cannot be found on this object [...] This is how I thought I'd find the proper value: [PS] C:\>Get-DynamicDistributionGroup "#Class of 2011" | fl *accept* AcceptMessagesOnlyFrom [snip] How do I find all the correct properties of the DynamicDistributionGroup object? [PS] C:\>Get-DynamicDistributionGroup | get-member -type property [snip] Name ---- AcceptMessagesOnlyFrom Well... it looks like that IS the correct property to use. So why isn't this working?

Remember that $DDG is an array of dynamicdistributiongroup objects. The individual dynamicdistributiongroup objects have an AcceptMessagesOnlyFrom property, but the array itself does not. $DDG | foreach-object {$_.AcceptMessagesOnlyFrom += "John Doe"} [string](0..33|%{[char][int](46+("686552495351636652556262185355647068516270555358646562655775 0645570").substring(($_*2),2))})-replace " "

Thanks. I suspected it had something to do with arrays... and that you would know the answer. Unfortuntately, I'm getting this error message (was sure it was going to work however!): [PS] C:\>$DDG | foreach-object {$_.AcceptMessagesOnlyFrom += "John Doe"} Exception setting "AcceptMessagesOnlyFrom": "Cannot convert value "System.Object[]" to type "Microsoft.Exchange.Data.MultiValuedProperty`1[Microsoft.Exchange.Data.Directory.ADObjectId]". Error: "Failed to convert John Doe from System.String to Microsoft.Exchange.Data.Directory.ADObjectId."" At line:1 char:27 It's not the array either, because I tried with a single group and get the same error. Tried with the email address as well: "jdoe@contoso.com"

In the meantime (I'd still like to figure this one out), I was able to get what I wanted like this: [PS] C:\>$Senders = ("John Doe", "Jane Doe", "Ellen Smith", "Ernie Smith") [PS] C:\>Set-DynamicDistributionGroup "#Class of 2011" -AcceptMessagesOnlyFrom $Senders I just arrow up and down, tab as needed, and change class years. It works...

On Sun, 17 Jul 2011 18:12:40 +0000, Le Pivert wrote: > > >Thanks. I suspected it had something to do with arrays... and that you would know the answer. > >Unfortuntately, I'm getting this error message (was sure it was going to work however!): > >[PS] C:\>$DDG | foreach-object {$_.AcceptMessagesOnlyFrom += "John Doe"} > >Exception setting "AcceptMessagesOnlyFrom": "Cannot convert value "System.Object[]" to type "Microsoft.Exchange.Data.MultiValuedProperty`1[Microsoft.Exchange.Data.Directory.ADObjectId]". Error: "Failed to convert John Doe from System.String to Microsoft.Exchange.Data.Directory.ADObjectId."" At line:1 char:27 > >It's not the array either, because I tried with a single group and get the same error. > >Tried with the email address as well: "jdoe@contoso.com" When you use the set-dynamicdistributiongroup you can use one of these as the data part of the -AcceptMessagesOnlyFrom parameter: * Distinguished name (DN) * Canonical name * GUID * Name * Display name * Alias * Exchange DN * Primary SMTP e-mail address When you're scripting you can't use a string where some other object type is required. Try this: $DDG | foreach {$_.AcceptMessagesOnlyFrom += (get-recipient "John Doe" -resultsize 1)} --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

Thanks. I will try that sometime - concentrating on some non-Exchange prbs right now.

Hi Le Pivert, Any update for your issue? Regards! Gavin

I honestly did not get a chance to look at this (and had solved the problem otherwise) but I'd be willing to bet Rich's solution works so I'm sure it deserves to be marked as the answer.