62530: Acronis Backup: specifying Exchange credentials fails with "The format of name is not supported"

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Symptoms

In Acronis Backup, you are specifying or updating credentials for Microsoft Exchange.

You get this error:

| error 0x15d0046: The format of name 'admin' is not supported.
| function: AppBackup::ParseUserLogonName

Cause

Specify domain.

Solution

Specify username as YOURDOMAIN\admin

For example:
Acroniscompany\administrator

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