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Keep Client or Server Side Rules?

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› Outlook › Rules, Filters & Views › Keep Client or Server Side Rules?

Last reviewed on January 30, 2017     17 Comments

Applies to: Exchange Server, Office 365 Exchange, Outlook.com

A user had mismatched rules in Outlook and his Exchange mailbox and wasn't sure what to do.

When I edit my rules, Outlook always asked if I want to use the Client or Server rules. What is the difference between them? Which should I be using?

Outlook stores rules in the Exchange server mailbox (including Outlook.com accounts) and syncs a copy of the rules to Outlook on your desktop. This message comes up when Outlook detects the rules on the server are not identical to the rules stored in the Outlook data file and Outlook needs to know which ones you want to work with. If you know one set is correct, choose it, otherwise choose Server.
keepo client or server rules dialog

To eliminate the message, you can start Outlook with one of the cleanrules switches:

SwitchDescription
/cleanrulesRemoves rules from both Outlook data file and the server mailbox
/cleanclientrulesOnly removes the client side rules
/cleanserverrulesOnly removes the server side rules

If you clear only the client rules, the server rules will sync down to Outlook; clearing the server rules works the same way, with the rules stored in Outlook syncing up to the server.

You'll first want to export the rules. This will allow you to restore the rules quickly and provides insurance, should something go wrong and you decide to delete all of the rules.

  1. Open the Rules & Alerts dialog, click Options and then Export rules.
    export rules
  2. Close the Rules & Alerts dialog then close Outlook.
  3. Press Windows key + R on your keyboard to open the Run command.
  4. Type or paste outlook.exe /cleanrules in the Open field to clear all rules.
    Use outlook.exe /cleanserverrules if you know some client rules didn't sync up to the server.
    Use outlook.exe /cleanclientrules to keep the server rules.
    run command
  5. Press Ok to restart Outlook.

If you used the /cleanrules switch, import the rules you backed up earlier. If you used either the client or server switch, open the Rules & Alerts dialog and choose which rules to keep one last time. The rules will sync so both client and server are identical.

Keep Client or Server Side Rules? was last modified: January 30th, 2017 by Diane Poremsky

Related Posts:

  • Server-side vs. Client-side Rules
  • Exchange Server's Rules Limitation
  • Rules & Alerts Dialog Won't Open
  • How to back up Outlook's Rules and Alerts Rules

About Diane Poremsky

A Microsoft Outlook Most Valuable Professional (MVP) since 1999, Diane is the author of several books, including Outlook 2013 Absolute Beginners Book. She also created video training CDs and online training classes for Microsoft Outlook. You can find her helping people online in Outlook Forums as well as in the Microsoft Answers and TechNet forums.

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Amir Chaudhry
January 25, 2023 11:30 am

Thank you in advance. Got it working!

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Diane Poremsky
Author
Reply to  Amir Chaudhry
January 25, 2023 4:36 pm

So you have everything squared away now?

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Amir Chaudhry
January 25, 2023 11:25 am

Hi Diane, I hope you are doing well.
during the client server dance i lost my server side rules but ended up exporting client side ones. t should be ok for me.

Now importing them on server side does not save them on the server. I can import but the rules are wiped out the instant I exit the dialog box.

BTW on windows 10 outlook.exe /cleanrules fails as unrecognized command.

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Tim
Reply to  Amir Chaudhry
March 21, 2025 11:42 am

If Outlook is not installed in the default location, you might need the full Outlook.exe executable path.

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Chris
May 24, 2022 10:43 am

Do not run this if you have rules on attached shared mailboxes. It will clear their rules as well

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Diane Poremsky
Author
Reply to  Chris
May 24, 2022 11:53 pm

Correct - it clears rules in all accounts in the profile.

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Mike
April 21, 2022 2:38 pm

worked like a charm

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Antonio
May 7, 2021 6:20 pm

Thank you very much

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Stijn Hommes
July 15, 2020 9:27 am

Thank you (please excuse my sarcastic tone) I chose server rules and all but two of my rules disappeared into thin air. Obviously not the right choice... When in doubt, choose client side rules, people.

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LStephen Alston
Reply to  Stijn Hommes
June 20, 2023 12:25 am

Thank you Stijn Hommes! Your "...when in doubt..." response precisely answers my specific concern.

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Dave
November 13, 2019 6:12 pm

Interesting fix…

First, I exported my rules (chicken here).

Then I did: RUN OUTLOOK.EXE /CLEANCLIENTRULES
It fixed it! Then I killed Outlook to see if it stayed fixed. It did not. I was about to turn my shortcuts (I have one in the Windows Menu and one on the Task Bar) to run this all the time (ie edit PROPERTIES to make this happen every time). Before I did that, I thought I’d go for clean it completely (CLEANRULES). Being a chicken, I decided to see if my rules would import. I did that (right on top of the existing rules figuring it would either work, or complain and I’d stop). It worked. Then I killed Outlook and re-ran Outlook and voilà, it appears to be permanently fixed (ie I’ve started and stopped Outlook about 5 times and it stays fixed).

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Danielle
May 16, 2018 11:09 am

I got the error message and clicked "Client" because I had been setting up rules all morning and figured they hadn't synced to the server yet. Apparently, that wasn't the right choice. I lost most of my many rules and the ones that are here I do not recognize. How do I revert this?

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Ali
Reply to  Danielle
March 9, 2020 8:24 am

I am in the same situation. Can anyone let me know how to get the server rules back?

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Diane Poremsky
Author
Reply to  Ali
March 9, 2020 10:32 am

Are the rules visible in Outlook on the web? If yes, you should see them in Outlook desktop. If they are not visible in Outlook on the web, they were deleted.

If you see client rules and don't mind deleting them, you can restart Outlook using the /cleanclientrules switch. The server rules will sync down.

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