Existing DNS Check Fails on Exchange 2016 CU 23 with DKIM Signer version 3.4.0

[mvanbeuren]

Versions

• Windows Server 2016
• Exchange 2016 CU 23
• 3.4.0

Description

DKIM signer installs successfully but when configuring "Domain Settings", the "existing DNS" check fails regardless of whether the "Direct NS Check" box is marked or not. (Will this cause issues with DKIM signing even if DKIM checkers such as DMARCian and MXToolbox see the record?)

Steps to Reproduce

1. Install DKIM signer
2. Begin configuration and proceed to "Domain Settings" page
3. Add domain and generate new key for domain
4. Click "Check" button for "Existing DNS" up to 3 days after changes made to external DNS to allow propagation

Expected behavior: Box auto-fills with matching "Suggested DNS record".

Actual behavior: Box says "no found for example._domainkey.domain.net" regardless of whether the "Direct NS check" box is marked or not.