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Calendar synch

David Hatcher 0 Reputation points
2026-05-26T15:46:13.05+00:00

I have a locally stored pst file for a pop3 account. I want to synch ONLY the calendar with my outlook.com calendar. I wish to have the local pst file remain the default entry point. Hence I want to also set up automatic synch of the calendar ONLY to the outlook.com calendar. I have 365 MSO version 2605. I need instructions on how to accomplish this.

Moved from Microsoft 365 and Office | Other

Outlook | Web | Outlook.com | Calendar
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  1. Victor1-V 8,910 Reputation points Microsoft External Staff Moderator
    2026-05-28T06:40:06.5166667+00:00

    Hi David Hatcher,

    I understand that you want to keep your POP account and local .pst file as the default entry point, but sync only the calendar with your Outlook.com calendar. Please note that this is a user-to-user forum, so contributors cannot change how Outlook sync works, but can help clarify the supported options.

    The AI Assist answer is correct in the main point. Outlook does not provide a built-in option to automatically sync only a calendar stored in a local POP .pst file to an Outlook.com calendar while keeping that local .pst calendar as the active calendar source.

    I would like to add one practical option for your setup. If you want your calendar to sync through Outlook.com, the Outlook.com calendar needs to become the calendar where the appointments are stored. You can still keep the POP account and local .pst for mail, but calendar items that need to sync should be created or copied into the Outlook.com calendar.

    In classic Outlook, you can try this approach:

    1. Add your Outlook.com account to classic Outlook if it is not already added.
    2. Go to Calendar view.
    3. Open both calendars: the local POP .pst calendar and the Outlook.com calendar.
    4. Copy the needed appointments from the local calendar to the Outlook.com calendar.
    5. Check the calendar at Outlook.com on the web to confirm the copied items appear there.
    6. Going forward, create new appointments in the Outlook.com calendar if you want them to sync across Outlook.com, Outlook mobile, or other Outlook clients.

    I suggest copying the items first rather than moving them, so you can confirm everything appears correctly in Outlook.com before removing anything from the local calendar.

    For reference, importing a calendar file into Outlook.com is only a one-time copy and does not keep refreshing later. Calendar subscription can refresh only when the source is an online iCal calendar URL. You may refer to: Import or subscribe to a calendar in Outlook.com or Outlook on the web. You can also review the Outlook import/export article here: Import and export Outlook email, contacts, and calendar.

    May I confirm whether you had a chance to try the AI Assist suggestion to move or copy the calendar data into the Outlook.com mailbox? If you already tried it, please let me know whether you are looking for a one-time migration or ongoing automatic calendar-only sync, since the second option is not available through built-in Outlook settings for a local POP .pst calendar.

    I hope this helps clarify the limitation and the closest supported setup.

    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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  2. AI answer

    2026-05-26T15:46:24.2033333+00:00

    Classic Outlook cannot automatically one‑way sync only a POP .pst calendar to an Outlook.com calendar while keeping the POP .pst as the default delivery store. The supported approach is to move or copy calendar data into a cloud mailbox (such as Outlook.com) and then use that mailbox as the calendar source that syncs to other Outlook clients/devices.

    From the provided information, the supported pattern for getting a local POP calendar into a cloud account is:

    1. Export or copy the local POP calendar into an Outlook.com mailbox.
    2. Use the Outlook.com account as the calendar that syncs to other Outlook endpoints (new Outlook, Outlook mobile, etc.).

    For POP calendars specifically, Outlook guidance is to use Outlook.com as the sync hub:

    1. Export the POP/local calendar from Outlook desktop.
    2. Import that calendar into an Outlook.com account following the steps in “Share an Outlook calendar on Outlook.com” (linked from the POP FAQ).
    3. Add the Outlook.com account to Outlook for Windows and set that Outlook.com calendar as the one to use across devices.

    However, there is no documented mechanism in the context that:

    • Keeps the POP .pst as the default data file, and
    • Automatically mirrors ongoing changes in that local POP calendar into Outlook.com on a continuous basis, and
    • Restricts sync to “calendar only” while leaving mail/contacts for that POP account local.

    The available guidance instead moves the calendar into the Outlook.com account so that Outlook.com becomes the cloud calendar source.

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

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