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Volume 23 Issue 16

Slipstick Systems

Issue Date: July 5, 2018 « Previous Issue | Next Issue »

The following articles were included in our Exchange Messaging Outlook (EMO) newsletter published on July 5, 2018.

EMO is a weekly publication. To receive your own copy of EMO by email, subscribe here.

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Today's Highlights:

  • Group Policy Update: Do Not Send a Response
  • Only one version of Outlook can run at a time
  • Deleting Calendar entries using PowerShell

Group Policy Update: Do Not Send a Response

In the last issue of Exchange Messaging Outlook, I explained how to use group policy to disable the tentative response option. The July 3 Outlook 2016 update builds in the ability to remove the “Do not Send a Response’ option.

This update is in Outlook 2016 Click to run and added to volume licensing version in the July 3 2018 update .

To hide the Do not Send a Response option, browse to the following registry key: HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Options\Calendar
Add a new DWORD named ForceMtgResponse and set the value to 1.

You'll need to restart Outlook.

Administrators can add the key to the policy path at HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\16.0\Outlook\Options\Calendar

In Outlook 2013, the only option is to disable the menu option, adding it to the HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\x.0\Outlook\DisabledCmdBarItemsList key. The command id is 19987.
Instructions to use Group Policy to disable commands are at

Use Group Policy to disable commands

Bug: Only one version of Outlook can run at a time

The problem: If Outlook is running and you click the taskbar icon, instead of another Outlook window opening, an error message comes up, telling you that Outlook is having trouble starting and you can only run one version of Outlook at a time.

“Sorry, we’re having trouble starting Outlook. Only one version of Outlook can run at a time. Check to see if another version of Outlook is running or try restarting your computer.”

Users with Insider builds have had this message for several weeks and it’s just now rolling out in the current releases.

The error message is annoying and pointless, as a second Outlook window opens after you click OK to dismiss the dialog.

The only way to stop it (until Microsoft fixes it) is to add the /Recycle switch to the Outlook shortcut.

  1. Open File Explorer and browse to C:\ProgramData\Microsoft\Windows\Start Menu\Programs.
  2. Right click on the Outlook Shortcut and choose Properties. Add /recycle to the Target path. "C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE" /recycle
  3. Save and close the properties dialog.

Repeat with the Outlook shortcut at C:\Users\%username%\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar

After you make this change, when you click on the pinned taskbar icon or the start menu shortcut, the open Outlook window will come into focus, without opening additional windows or displaying an annoying dialog.

Deleting Calendar entries using PowerShell

The problem: a user’s calendar is a mess, with calendar items each duplicated hundreds of times. We want to delete everything and start over. Deleting the from Outlook for Mac is a lesson in futility as list view only displays one month at a time.

If you have a computer with Outlook for Windows installed you could open the mailbox, switch to list view and select all, then delete. It will be slow and tie up Outlook until the events are all deleted.

The administrator can use PowerShell to delete all events on the calendar.
Log into office 365 using the admin account then run this command on the user's mailbox to move everything into the delete items recovery.
Search-Mailbox –identity email@address –SearchQuery kind:meetings –DeleteContent

New & Updated Exchange KB Articles

Event ID 2080 from MSExchangeDSAccess
https://support.microsoft.com/help/316300

Outlook 2013 or 2016 may not connect using MAPI over HTTPs as expected
https://support.microsoft.com/help/2937684

Public folder permissions for Exchange Server
https://support.microsoft.com/help/2573274

New & Updated Office 365 KB Articles

Cancel or turn off recurring billing for a Microsoft subscription
https://support.microsoft.com/help/4027815

How to set language and region settings for Office 365
https://support.microsoft.com/help/4018959

Hybrid free/busy lookups fail between Exchange Server 2016 CU8 and O365
https://support.microsoft.com/help/4058297

Office 2019 Commercial Preview frequently asked questions
https://support.microsoft.com/help/4133312

Preparing for the mandatory use of TLS 1.2 in Office 365
https://support.microsoft.com/help/4057306

Security Settings for COM objects in Office
https://support.microsoft.com/help/4058123

New & Updated Outlook KB Articles

How to scan Outlook by using the Microsoft Support and Recovery Assistant tool
https://support.microsoft.com/help/4098558

July 3, 2018, update for Outlook 2016 (KB4022230)
https://support.microsoft.com/help/4022230

Outlook freezes when creating a Skype meeting in Skype for Business 2016 running in a terminal server session
https://support.microsoft.com/help/4294969

Synchronization is unsuccessful after mailbox items are changed through EWS calls in cached-mode Outlook client
https://support.microsoft.com/help/4093129

You can't sign in after you update to Office 2016 build 16.0.7967 or later on Windows 10
https://support.microsoft.com/help/4025962

Other Resources

July 2018 Non-Security Office Update Release

Volume 23 Issue 16 was last modified: September 29th, 2021 by Diane Poremsky

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Outlook for Mac Recent issues: Fixes or workarounds for recent issues in Outlook for Mac

Outlook.com Recent issues: Fixes or workarounds for recent issues on Outlook.com

Office Update History

Update history for supported Office versions is at Update history for Office

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Use Outlook.com Feedback for suggestions or feedback about Outlook.com accounts.

Other Microsoft 365 applications and services




New Outlook Articles

Error Opening iCloud Appointments in Classic Outlook

Opt out of Microsoft 365 Companion Apps

Mail Templates in Outlook for Windows (and Web)

Urban legend: Microsoft Deletes Old Outlook.com Messages

Buttons in the New Message Notifications

Move Deleted Items to Another Folder Automatically

Open Outlook Templates using PowerShell

Count and List Folders in Classic Outlook

Google Workspace and Outlook with POP Mail

Import EML Files into New Outlook

Newest Code Samples

Open Outlook Templates using PowerShell

Count and List Folders in Classic Outlook

Insert Word Document into Email using VBA

Warn Before Deleting a Contact

Use PowerShell to Delete Attachments

Remove RE:, FWD:, and Other Prefixes from Subject Line

Change the Mailing Address Using PowerShell

Categorize @Mentioned Messages

Send an Email When You Open Outlook

Delete Old Calendar Events using VBA

Repair PST

Convert an OST to PST

Repair damaged PST file

Repair large PST File

Remove password from PST

Merge Two Data Files

Sync & Share Outlook Data

  • Share Calendar & Contacts
  • Synchronize two computers
  • Sync Calendar and Contacts Using Outlook.com
  • Sync Outlook & Android Devices
  • Sync Google Calendar with Outlook
  • Access Folders in Other Users Mailboxes

Diane Poremsky [Outlook MVP]

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