Update Set-CalendarProcessing.md

Updates per email request

Author: chrisda

exchange/exchange-ps/exchange/Set-CalendarProcessing.md

@@ -114,8 +114,29 @@ Set-CalendarProcessing -Identity "Car 53" -AutomateProcessing AutoAccept -BookIn
 
 This example allows a list of users to submit in-policy meeting requests to the equipment mailbox for Car 53.
 
+The users you specify for the BookInPolicy using this syntax overwrite any existing values.
+
 ### Example 7
 ```powershell
+$CurrentBIP = (Get-CalendarProcessing -Identity "Conference Room 1").BookInPolicy
+
+$AddToBIP = "[email protected]","[email protected]"
+
+$UpdatedBIP = $CurrentBIP + $AddToBIP
+
+Set-CalendarProcessing -Identity "Conference Room 1" -BookInPolicy $UpdatedBIP
+```
+
+This example adds Shiraz and Chris to the BookInPolicy of the room mailbox named Conference Room 1 without affecting any existing BookInPolicy values.
+
+The first command retrieves the current BookInPolicy values of Conference Room 1 and stores them in a variable.
+
+The next two commands identify the new users to add to the BookInPolicy, combine the old and new values, and store the updated list a variable.
+
+The last command updates the BookInPolicy value with the combined list.
+
+### Example 8
+```powershell
 $group = New-DistributionGroup "Room 221 Booking Allowed"
 
 Update-DistributionGroupMember -Identity $group.Identity -Members [email protected],[email protected] -BypassSecurityGroupManagerCheck:$true
@@ -125,12 +146,12 @@ Set-CalendarProcessing -Identity "Room 221" -AutomateProcessing AutoAccept -Book
 
 This example rejects meeting requests from any user who isn't a member of the "Room 221 Booking Allowed" distribution group.
 
-### Example 8
+### Example 9
 ```powershell
 Set-CalendarProcessing -Identity "Room 221" -ProcessExternalMeetingMessages $false
 ```
 
-This example rejects meeting requests from any user who isn't a member of the Exchange organization.
+This example rejects meeting requests from any user who isn't a member of the Exchange organization.\
 
 ## PARAMETERS
 
@@ -416,7 +437,9 @@ Query-based groups (for example, dynamic distribution groups) aren't supported.
 
 In delegate and principal scenarios, if the delegate or principal is specified by the BookInPolicy parameter, in-policy meeting requests to the resource mailbox are automatically approved.
 
-You can enter multiple values separated by commas. If the values contain spaces or otherwise require quotation marks, use the following syntax: `"Value1","Value2",..."ValueN"`.
+To replace the existing list of users or groups with the values you specify, use the syntax `UserOrGroup1,UserOrGroup2,...UserOrGroupN`. If the values contain spaces or otherwise require quotation marks, use the syntax `"UserOrGroup1","UserOrGroup2",..."UserOrGroupN"`.
+
+To add users or groups without affecting the other entries, see Example 7.
 
 ```yaml
 Type: RecipientIdParameter[]