When an object can have multiple values on an object like, I use most of the time: -Object @{Add=''} or -Object @{Remove=''}. But I notice that this not works all the time, than you need to set all the values because other wise it replaces the existing values.

For example, when I use:

Set-Mailbox "Contoso Executives" -GrantSendOnBehalfTo @{Add='[email protected]','[email protected]'}

The @{Add=''} is working. But when I use:

Set-RetentionPolicy "MRM Policy" -RetentionPolicyTagLinks @{Add='tag1','tag2'}

I get the following error:

Cannot convert value "System.Collections.Hashtable" to type

Why does this happens? RetentionPolicyTagLinks can have multiple values in the same way as GrantSendOnBehalfTo can have.

CodePudding user response：

Your issue is within the format of your RetentionPolicyTagLinks parameter.

Try the documentation below to help you with storing it in a variable first:

https://docs.microsoft.com/en-us/exchange/add-or-remove-retention-tags-exchange-2013-help