moved website - exchange server mail not working
I have a client who I have designed a new website for. They have an existing website with another host.

Ready for the site to go live I liaised with the other host and gave the ip address of my server. Instructed them to just change the A record so that it pointed to the new site but would leave the email in place.

All seems fine the new site 'and' the webmail login is showing on all machines EXCEPT in the building where the client is.

All their emails are down (the MX settings and ip for the exchange server haven't been touched). I can't even access the new site from their office, but next door it's fine.

Is this a DNS issue with the exchange server? If so how can it be resolved?

Thanks very much for your help.
moved website - exchange server mail not working
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I have a client who I have designed a new website for. They have an existing website with another host.

Ready for the site to go live I liaised with the other host and gave the ip address of my server. Instructed them to just change the A record so that it pointed to the new site but would leave the email in place.

All seems fine the new site 'and' the webmail login is showing on all machines EXCEPT in the building where the client is.

All their emails are down (the MX settings and ip for the exchange server haven't been touched). I can't even access the new site from their office, but next door it's fine.

Is this a DNS issue with the exchange server? If so how can it be resolved?

Thanks very much for your help.