The safest way to migrate BigRock email into Office 365 is to use a reliable tool like the CloudXena IMAP Backup Tool. This program is specially designed to convert IMAP email accounts; one of its primary purpose is to provide an easy way to move through the migration of IMAP email (such as; bigRock email into Office 365) with ease, in a most efficient and secure manner with 100% assurance.

Here are the following steps:-

1. First, download and install the CloudXena IMAP Backup Tool and click Continue.
2. Next, enter your credentials and click Login.
3. Next, choose the file format and click Next.
4. Now, select the save details by clicking on Use Modern Authentication
5. Then click on the Login option and enter your credentials, then click Next.
6. Select the MailBox option and click Next.
7. Also, if necessary, you can apply the additionals filters you need (to filter your migration) and click Start Process.
8. Finally, at the end you will have successfully migrated BigRock Email to Office 365.

Know More: https://www.cloudxena.com/blog/migrate-bigrock-email-to-office-365/