Email Sync Problems

How to Fix Outlook Email Sync and Profile Problems

Maira Mehtab Oct 14, 2026 869 views

Question details

The user is experiencing persistent synchronization issues affecting emails, contacts, and calendars when multiple accounts are configured together.

Product: Microsoft Outlook
Device & OS: not provided
Scenario: Attempting to sync email, contacts, and calendar data across multiple profiles including Gmail and Outlook.com within Microsoft 365.
Observed behavior: Synchronization fails or behaves inconsistently due to incorrect account protocols, misconfigured default data files, or underlying profile corruption on the primary computer.

Before you start

Ensure you have your email account passwords ready and verify that you have a stable internet connection before modifying your Outlook account settings or creating a new profile.

Solution 1Recommended

Verify and Adjust Outlook Account Settings

Check your configured email accounts and data files to ensure they are using the correct protocols and default settings.

Incorrect server protocols or data file settings can prevent contacts and calendars from syncing properly between services like Gmail and Outlook.com.

Open Account Settings

Open Outlook, click on the 'File' tab in the top left corner, select 'Account Settings', and click 'Account Settings' again from the dropdown menu.

Verify Email Protocols

Under the 'Email' tab, check your listed accounts. Ensure that Outlook.com is configured as a Microsoft Exchange account and Gmail is set as IMAP.

Check Default Data File

Switch to the 'Data Files' tab and confirm which data file is set as default. This specific file determines where your default contacts and calendar folders are stored.

Verify and Adjust Outlook Account Settings

Separate Default Settings: Keep in mind that your default email account and your default data file are managed separately in Outlook and may need independent adjustments.

Solution 2

Create a New Outlook Profile

If adjusting account settings does not resolve the issue, your current Outlook profile might be corrupted and needs to be replaced.

Solution 3

Reinstall Microsoft 365

When underlying software corruption causes persistent sync failures, reinstalling the entire Office suite can restore normal functionality.

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Frequently Asked Questions

Why are my Outlook contacts not syncing with Gmail?

Outlook stores default contacts in your default Data File. If your default data file is tied to an Outlook.com or local account rather than your Gmail IMAP account, those contacts will not sync across the two services natively.

What is the difference between an Exchange and IMAP account in Outlook?

Exchange accounts fully sync emails, calendars, and contacts automatically across all your devices. IMAP accounts primarily sync emails but do not natively sync calendars or contacts without the help of third-party add-ins.

How do I know if my Outlook profile is corrupted?

Common signs of a corrupted profile include persistent sync errors, Outlook crashing frequently on startup, missing data despite having correct server settings, or the application working fine on a secondary computer but failing on your primary one.

Will creating a new Outlook profile delete my old emails?

No, your emails remain safely stored on the email server (for Exchange and IMAP accounts) or in your original PST data files. Creating a new profile simply establishes a fresh connection to your existing data.

Outlook & Email Problems