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MS365 Outlook Web Signatures loading slow, not loaded, partial loaded.

Tony Vang 0 Reputation points
2025-07-17T19:12:47.4566667+00:00

Hello,

We are using MS365 Enterprise and user has opened his Outlook via web. When user opens an email to send or respond by opening his signatures, they either load slow, partial, or have (signature not loaded) blanked out. I have tested and noticed this as a sync issue loading. A go around was to close the new email draft out and reload a new draft to check the progress. This is usually done a few times, if you don't do this the signatures will not prompt up for selection. Question is how do we, bypass this issue of the signature syncing process by not closing every time to check the status/signatures to show up. I have attached pictures showing the signatures errors.

image (5)

Screenshot 2025-07-17 140637

Outlook | Web | Outlook on the web for business | Settings

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  1. Alexis-NG 2,425 Reputation points Microsoft External Staff Moderator
    2025-07-17T19:50:49.9733333+00:00

    Hi Tony Vang, 

    Thanks for reaching out to the Q&A Forum. 

    Based on your description, it seems like you're experiencing a  issue with Outlook Web App (OWA) in Microsoft 365 Enterprise where email signatures either load slowly, partially, or not at all—often showing a “signature not loaded” message. 

    This issue stems from this bug in the cloud signature sync mechanism between Outlook Desktop and Outlook Web. Specifically: 

    • Newly created signatures may fail to sync due to corrupted registry settings or cached account data. 
    • Outlook checks for a match between local and cloud-stored signatures. If the new signature isn’t found in the cloud list shortly after sync, Outlook deletes it    

    Microsoft has released a fix in the following builds: 

    • Beta Channel: Version 2411 (Build 18205.15010) 
    • Current Channel Preview: Version 2411 (Build 18205.15010) 
    • Current Channel: Version 2410 (Build 18129.20124) 
    • Monthly Enterprise Channel: Versions 2409 and 2408 
    • Semi-Annual Enterprise Channel: Version 2402 and 2408 

    If your organization hasn't yet deployed these updates, you may still encounter the issue. 

    If the fix isn’t available or hasn’t resolved the issue, try this manual workaround: 

    1. Open Registry Editor (Regedit) 
    2. Navigate to: 

    Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\Outlook\Settings 

    1. Right-click the Settings key and rename it to: 

    Settings_old 

    1. Restart Outlook

    This clears corrupted cloud sync data and forces Outlook to rebuild the signature cache.

    Should you have any questions related to this issue, please don't hesitate to reach out.

     If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".  

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread. 

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