Hi, all! I'm looking for some specific answers on downtime and/or what's transferred when during a domain transfer from one registrar to another. Some posts/threads have suggested it only takes "a little while" and transfers the entire zone file, and others have suggested it does *not* transfer the zone file and Network Solutions own documentation says "5-7 days" after administrative approval. So here's the situation...
We're in the process of a merger with another company, DomainA.com with Registrar-A. They are running their own Exchange system (MX records) and website (WWW record), amongst others. Over a very short time period (one weekend) we need to essentially change their WWW and MX records to point to our smarthost (Mimecast) for our domain, DomainB.com at Registrar-B.
First, I don't know how long the current solutions provider will keep the domain registration alive at Registrar-A, so do I need to do the domain transfer FIRST, hope nothing changes on Registrar-A, and change the zone records (NS & MX records) on Registrar-B on the Big Day?
Second, my concern is that doing a domain transfer before the Big Day will either stop the registrar from hosting the record at their whim (several posts have seen this done in the past), and whether creating a new Zone file on Registrar-B will screw up the zone file/hosting at Registrar-A.
Website records aren't relevent; the key here is zero downtime when we change the MX record to have DomainA.com mail start flowing into our smarthost @ Mimecast (for DomainB.com).
It's been a few years since I've done this with an active domain, so I need to be sure that all the I's are dotted and the T's are crossed. Thanks!