How many mails does outlook sync to ost

Outlook's Offline Storage Table (OST) file is used to store a local copy of your email messages, contacts, calendar, and other data when you're not connected to the internet. The number of emails that Outlook syncs to the OST file depends on several factors, including:

  1. Account settings: The number of emails that Outlook syncs to the OST file is determined by the account settings. For example, if you have a POP3 account, Outlook will download a set number of emails (usually 1-2 weeks' worth) and store them in the OST file. If you have an IMAP account, Outlook will sync all emails, including those on the server.
  2. OST file size limit: Outlook has a default OST file size limit of 2 GB. If the OST file grows larger than this limit, Outlook will start deleting older emails to free up space. You can increase the OST file size limit by modifying the registry or using a third-party tool.
  3. Email retention policy: Your organization's email retention policy may also impact the number of emails that Outlook syncs to the OST file. For example, if your organization has a policy to retain emails for a certain period, Outlook may only sync emails that are within that retention period.
  4. OST file age: Outlook will typically only sync emails that are within a certain age range (e.g., 1-2 weeks) to the OST file. Older emails may not be synced to the OST file, depending on the account settings and OST file size limit.

In general, Outlook will sync a large number of emails to the OST file, but the exact number will depend on the factors mentioned above. Here are some rough estimates:

Keep in mind that these are rough estimates, and the actual number of emails that Outlook syncs to the OST file may vary depending on your specific situation.