DKIM settings error with 123-Reg

DKIM settings error with 123-Reg

Hi

I am not quite sure what I am doing wrong.  In CRM Plus Email Channel I have setup IMAP email (domain in 123-reg, email in Microsoft Office 365).  But the Credentials have failed.  I believe it's because I need to verify the email DNS settings.

In Email Deliverability it ask that I need to Validate records.

I have copied the SPF details into 123-reg DNS settings and this has been verified successfully.

However, when I copy in the DKIM (as a TXT/SPF type), Zoho states DKIM record missing.

Please can someone help me set this up as I am no longer able to receive or send emails :(