IMAP migration HostGator to Exchange online

Question

The email migration tutorial provided by Microsoft provides detailed instructions for using a mail administrator account in the CSV upload file to avoid having to reset user passwords during an email migration, however it does not work when migrating from
HostGator, which uses a Dovecot mail server.  Instructions for migrating from Dovecot are given explicitly in Microsoft's documentation (copied below), however, when specifying Administrator credentials in the CSV upload file, I always get the same error
- "Unable to login". I tried several different things as configurable seperator * . / # but nothing worked. I tested using admin credentials to access a user account in a mail client (outlook, thunderbird) and that worked fine, so it's not a permission
issue.
Dovecot
For IMAP servers that support Simple Authentication and Security Layer (SASL), such as a Dovecot IMAP server, use the format Admin_UserName*User_UserName where the asterisk ( * ) is a configurable separator
character. Let's say you're migrating those same users' e-mail from a Dovecot IMAP server using the administrator credentials mailadmin and P@ssw0rd. Here's what your CSV file would look like:
Copy
EmailAddress,UserName,Password
[email protected],mailadmin*terry.adams,P@ssw0rd
[email protected],mailadmin*ann.beebe,P@ssw0rd
[email protected],mailadmin*chris.cannon,P@ssw0rd

Answer 1

Hi Alberto,
Thanks for your reply. I'm almost certain the formatting is correct. I tested that by successfully starting a migration batch of the administrator parent account. Which indicated a permission issue, however, as mentioned, I was able to add user accounts
via a mail client using the same administrator credentials.
To better explain:
This worked:
EmailAddress,UserName,Password
[email protected],mailadmin,P@ssw0rd
This did not:
EmailAddress,UserName,Password
[email protected],mailadmin*terry.adams,P@ssw0rd