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    We have one machine running Windows 10 Pro 64 bit receiving a prompt asking for credentials for Microsoft Windows Search Protocol Host

    The machine is on a domain and Active Directory

    This is the only machine reporting this issue. We have other Win 10 Pro machines and none are reporting this

    Why is this happening and how to stop these pop-ups?

    Monday, October 17, 2016 4:38 PM

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    Hi,

    In another side, please open Task manager, if you can find SearchProtocolHost.exe Under Details, please right click to Open file location, The file SearchProtocolHost.exe is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 164,352 bytes

    If not, in the right location, that could be dangerous, please test in Safe mode and Clean boot mode.

    If the issue doesn't happened, scan virus with Defender in Safe Mode to check this issue.

    Please remember to mark the replies as answers if they help and unmark them if they provide no help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Thursday, October 20, 2016 9:16 AM

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    Well some things to try perhaps, System file check (SFC) Scan and Repair System Files & DISM to fix things SFC cannot (guide by Team ZigZag) to generally check the system.

    A virus and malware scan just to check.

    Try deleting the Index cache and letting it rebuild (thinking it might have indexed or be trying to indexed some that has been protected). From an admin command prompt (right click start open Command Prompt (Admin) );

    net stop WSEARCH
    rd C:\ProgramData\Microsoft\Search /s /q
    net start WSEARCH

    Check the Index and let it build.

    Beyond that if it is just one workstation then would be worth rebuilding it I would say.

    Monday, October 17, 2016 10:01 PM
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    I am having the exact same issue with a single machine on our network (Win 10 Pro 64 bit Build 14393).

    The user is a local Administrator and is in a Workgroup (not a domain).

    Repeatedly confirming the login info and clicking OK (more than a dozen times) seems to work for several minutes but then the popup re-appears.

    Wednesday, October 19, 2016 5:49 PM
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    Hi,

    In another side, please open Task manager, if you can find SearchProtocolHost.exe Under Details, please right click to Open file location, The file SearchProtocolHost.exe is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 164,352 bytes

    If not, in the right location, that could be dangerous, please test in Safe mode and Clean boot mode.

    If the issue doesn't happened, scan virus with Defender in Safe Mode to check this issue.

    Please remember to mark the replies as answers if they help and unmark them if they provide no help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Thursday, October 20, 2016 9:16 AM
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    thanks Kate, yes seachprotocolhost is in my system32 folder.

    file size is 341 KB (349,184 bytes)

    since the file is in the correct location is all ok?

    still , how to stop the pop up?

    Thursday, November 24, 2016 9:33 PM
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    Hi,

    Having a similar problem with the pop-up.

    It's ask met to login to an old domain, which is not used anymore, the system, is now a member of a workgroup and connected to office 365

    So Kate how do we stop the popo-up


    Monday, December 19, 2016 7:49 AM
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    Like Marc, I verified SearchProtocolHost.exe in the \Windows\System32 folder on our Windows 10 Pro machines.  Both had a file size of 341 KB (349,184 bytes).  File version 7.0.14393.206 dated 9/15/2016 11:36AM.

    I also ran a full virus scan as well as Malwarebytes Anti-malware.  Both came up clean.

    I am not 100% certain, but I am fairly sure that for me this is related to our Office 365 subscriptions.  This occurred on just two machine out of a dozen in our building.  Both were recently (two days ago) switched from Office 365 Business Premium through Microsoft to simply Office 365 Business with Rackspace now as the reseller. (BTW - I highly recommend Rackspace for hosted email.  We used to struggle with email through a local provider where it would go offline several times each month.  Now we are using a combination of hosted Exchange and the more simple Rackspace email.  Both work flawlessly!)

    They both updated to the latest versions of the Office programs today.  That is when we noticed that when one of the users tried to open a file attachment in Outlook, this pop-up appeared.  It was asking for the credentials that were associated with the prior subscription of Office 365 through Microsoft which is what tipped me off.

    I instructed the user to enter their proper Windows credentials and check the box to remember them.

    That seems to have fixed the problem for us.  I hope this works for you too.


    Thursday, January 19, 2017 5:48 PM
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    Close Outlook, restart the computer, DO NOT open Outllook following reboot, open the Mail utility in the Windows Control Panel, take a look at what profiles are there. If the user was previously set up for an Exchange account or a different style of username (johnd vs. John.Doe), delete the old profile and re-create it. If there is only one profile, delete it and re-create it. After making the changes go ahead and open Outllook. We've seen this on some machines that had trouble during an Office365 migration, the problem did not show up until over a year later. For Office365 accounts use the full email address for the username, e.g. John.Doe@acme.com

    • Edited by D00mM4r1n3 Friday, March 17, 2017 5:21 PM
    • Proposed as answer by D00mM4r1n3 Friday, March 17, 2017 5:22 PM
    Friday, March 17, 2017 5:20 PM
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    I thought I replied to this, removing unnecessary profiles fixed my problem. thanks to all 
    • Proposed as answer by TGlavas Saturday, April 29, 2017 9:01 AM
    Friday, March 17, 2017 11:29 PM
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    That fixed the problem for me too. I also needed to restart the Windows Search service. 

    # net stop WSearch
    # net start WSearch

    In Credential Manager I removed all unnecessary entries related to that user account.

    Saturday, April 29, 2017 8:59 AM
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    I was having the same issue with a searchprotocolhost pop up. The file location was not in System32 folder and when I found the file it's size was 317 KB. It was in a WOW64 folder. I uninstalled Office 365 and reinstalled. The pop up has been removed as well as the WOW64 folder. Problem solved. 
    Saturday, January 6, 2018 5:58 PM
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    I have a similar problem but the "Connecting To" email in the popup is my wife's @outlook.com email address and her account is not on my computer. The only two accounts that are listed in Outlook are my @outlook.com and my work email accounts. The popup appease every time that I restart Outlook

    Bratts

    Wednesday, August 8, 2018 10:47 AM
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    I have read that search may be trying to index older mail profiles, and it is this older profile that is asking for credentials.  
    I solved this by either removing the old profile (it was typically there as a backup during an upgrade), or connecting as the old profile and updating the credentials.

    (apologies - I only just spotted that someone mentioned it here also.)

    • Edited by wolfcamel Thursday, April 18, 2019 2:18 AM
    Thursday, April 18, 2019 1:32 AM
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    @Marc Morris:  I have removed all unnecessary profiles.  Didn't work.  Removed the one remaining profile and started a new one.  That didn't work either.  I think I'll try uninstalling office and re-installing office next.  
    Friday, May 3, 2019 10:37 PM
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    @Marc Morris:  I have removed all unnecessary profiles.  Didn't work.  Removed the one remaining profile and started a new one.  That didn't work either.  I think I'll try uninstalling office and re-installing office next.  

    Hi Marc, this is what I did.

    Had the redundant Microsoft Search Protocol Host issue this morning in Outlook, Excel, Word, Skype for Business. We're AD/Domain/Exchange/0365 driven environment. First checked Search Protocol Host.exe was in Windows\System32 folder, it was. Size was 436kb. Then signed out of all office products, Cleared Credential Manager, did a full repair on Office0365. Checked Outlook profiles, there was 2, one was called "Outlook" the other was the person's username_sk, strange!!! I deleted the username one and tried to open the Outlook one, No Joy!!. Next, I created a new Outlook profile let it sync up, finally no Prompt for Credentials, Yay!!! and that finally worked. Looks like the Profile got BORKED.  Hope this helps someone.



    Thursday, May 9, 2019 3:25 PM
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    Tried to add some screen shots but it won't let me. Says I need to get verified.
    Thursday, May 9, 2019 3:40 PM
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    thanks, removing old profiles fixed it for me
    Thursday, May 9, 2019 10:44 PM
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    I'm experiencing the same problem as Marc has. However, when I look inside the Mail (Microsoft Outlook 2016) (32-bit) applet within the Control Panel. I only have 1 profile there, so deleting it means I delete the only one I have. What happens to my email, if I delete the only profile that's there?

    Rod

    Wednesday, June 12, 2019 12:07 PM
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    hiya, with regard to deleting your profile, what happens to the email depends how its set but in most cases it should all be safely stored on the server, and when you re-make the profile it should all download again
    Wednesday, June 12, 2019 1:12 PM
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    I'm experiencing the same problem as Marc has. However, when I look inside the Mail (Microsoft Outlook 2016) (32-bit) applet within the Control Panel. I only have 1 profile there, so deleting it means I delete the only one I have. What happens to my email, if I delete the only profile that's there?

    Rod

    If you using Office 0365, if so it will create the profile.

    Have you tried to create another profile, this way you won't delete the only one. You can have multiple profiles, just select the radio button to prompt for which one to use. If that works you can go back and delete the one that was being a problem.

    What have you tried so far? Have you tried anything I mentioned @Marc Morris. Sign out of all office products, Cleared Credential Manager, do full repair on Office0365?


    Wednesday, June 12, 2019 7:12 PM
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    this is a user prompted problem and having to destroy their footprint seems like an awfully aggressive solution.  When users move from Office to Office 365 by their IT organization the user doesn't have a clue, no matter how advanced of a user or technician they may be, what the IT organization has proffered as a configuration for the upgrade.  Maybe a better upgrade path should be required to prevent users who work just fine one day from being irritated ad nausium with a credential manager for outlook when everything else works fine, ie. all network connections using the same windows credentials aren't having this problem.
    Thursday, February 6, 2020 3:09 PM