Outlook synchronizes only 4 emails at a time with gmail.

Question

Microsoft 365 Outlook will only synchronize 4 items a at time with gmail. Gmail is set up as a pop service. Gmail uses only 65% of available 100gb of storage. If I need to change to IMAP, how do I make the change without losing data? This started a few months ago before I installed Microsoft 365.

Answer 1

To change your Gmail setup from POP to IMAP in Outlook without losing data, follow these steps:

1. Enable IMAP in Gmail:
   • Sign in to your Gmail account.
   • Click on the gear icon in the upper right corner and select Settings.
   • Go to the Forwarding and POP/IMAP tab.
   • Under IMAP Access, select Enable IMAP and save your changes.
2. Remove the POP Account from Outlook:
   • Open Outlook and go to File > Account Settings > Account Settings.
   • Select your Gmail account configured as a POP account and click on Remove.
   • This will not delete your emails from the Gmail server, as they will remain accessible via the web interface.
3. Add the Gmail Account as an IMAP Account:
   • In Outlook, go to File > Account Settings > Account Settings.
   • Click on New and select Email Account.
   • Enter your name, email address, and password.
   • Choose IMAP as the account type.
   • For incoming mail server, use imap.gmail.com, and for outgoing mail server, use smtp.gmail.com.
   • Ensure that the port settings are correct: IMAP uses port 993 with SSL, and SMTP uses port 587 with TLS.
4. Complete the Setup:
   • Follow the prompts to finish adding your account.
   • Once added, Outlook will start synchronizing your emails from Gmail via IMAP.
5. Verify Data:
   • Check that all your emails, folders, and settings are intact after the migration to IMAP.

By following these steps, you can switch to IMAP without losing any data from your Gmail account.

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References:

• Prepare your Gmail or Google Workspace (formerly G Suite) account for connecting to Outlook and Microsoft 365 or Office 365
• Learn more about setting up your IMAP server connection in Exchange Online

Answer 2

Dear Raymond Wiens,

Thank you for posting your question to the Microsoft Q&A forum and for providing such precise details regarding your storage usage. I understand how frustrating it is to deal with slow synchronization, especially when managing a large mailbox, and I appreciate you reaching out to ensure your data is safe before making changes.

Based on the storage metrics you shared (65GB usage) and your goal to switch to IMAP, you have identified the correct path forward. However, I want to provide a specific technical explanation for why a standard migration might fail in this scenario:

By default, the Outlook application imposes a hard limit of 50GB for its local data files (.ost and .pst). Since your mailbox is currently at 65GB, if you simply switch to IMAP and attempt to synchronize "All" data, the local file will exceed this architectural limit. This typically causes the application to stop syncing or become unstable before the process completes.

To successfully migrate to IMAP without data loss or system instability, we need to bypass this limit using the "Mail to Keep Offline" feature. Please follow the detailed plan below:

Step 1: Export your data

Before removing the POP account, we must ensure you have a static backup.

1. Go to File > Open & Export > Import/Export.
2. Select Export to a file > Outlook Data File (.pst).
3. Select your Gmail account (the top level) and ensure Include subfolders is checked
4. Save this file to your Desktop as Gmail_Backup.pst.
   • If any synchronization discrepancy occurs later, this file ensures you can view your emails exactly as they exist today.

Step 2: The "Limit" Configuration (Crucial)

This step is the key to managing your 65GB mailbox within Outlook's 50GB limit.

1. Go to File > Account Settings > Account Settings.
2. Remove the existing POP account.
   • Note: Outlook may warn that "Offline cached lists will be deleted." This is expected and safe because you have the backup from Step 1.
3. Click New... and enter your Gmail address. Outlook will auto-detect it as IMAP.
4. Important: During the setup (or immediately after by double-clicking the new account), look for the "Mail to keep offline" slider.
5. Do not set this to "All." Please set it to 1 Year or 2 Years.
   • This keeps recent emails fast and accessible on your PC, while the older data (the remaining 40GB+) stays safely on Google's servers. You can still search for them, but they will not consume local drive space or trigger the 50GB limit.

Step 3: Recovering Missing Data

Once the IMAP connection is established, it will download the timeframe you selected. If you notice any items missing that were present in your POP account (such as Sent Items or local folders):

1. Go to File > Open & Export > Open Outlook Data File.
2. Select the Gmail_Backup.pst you created in Step 1.
3. This will appear as a separate folder tree in your Outlook pane. You can simply Drag and Drop any specific missing emails from that backup folder into your active Gmail folders.

I hope this explanation provides clarity on how to navigate the storage architecture safely. Please let me know if you run into any hurdles during this process.

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