Added PMM and calendar scripts

EXO/Set-GlobalMailboxPermissions.ps1

@@ -0,0 +1,22 @@
+Write-Host "What is the UPN of user or group that should be added: " -NoNewline
+$upn = Read-Host
+
+Write-Host "What permissions should be applied: " -NoNewline
+$calendarPermission = Read-Host
+
+Write-Host "Granting $upn $calendarPermission permission to all mailboxes"
+
+$mailboxes = Get-EXOMailbox
+
+$totalMailboxes = $mailboxes.Count
+$processCount = 0
+
+Write-Progress -Activity "Applying calendar permissions" -Status "Starting" -PercentComplete 0
+
+foreach ($mailbox in $mailboxes) {
+    $calendarPath = "$($mailbox.UserPrincipalName):\Calendar"
+    $processCount++
+    $percentComplete = (($processCount / $totalMailboxes) * 100)
+    Write-Progress -Activity "Applying calendar permissions" -Status "Processing $calendarPath" -PercentComplete $percentComplete
+    Add-MailboxFolderPermission -Identity $calendarPath -User $upn -AccessRights $calendarPermission -SharingPermissionFlags Delegate
+}