I am new to this and have looked at the wiki but nothing specific to my scenario.
I have three Mikrotik routers using in three areas the source comes in at point A (10.0.6.1) and feeds to point B in the east and point C in the west. I currently have both point B and C bridged to allow person connecting through the access points at B&C to get IP from point A. My question is there a way to route at B &C and still use the DHCP server at A to generate IP's.
I want the ip address to be from A since at times some persons may connect to either A,B or C.
I tried routing from B and C separately and used IP's 10.0.7.1 and 10.0.8.1 respectively and sometimes a unit would get a 8.1 address and then connect to the 7.1 AP and could not browse.
Any suggestions would be welcomed

This is a bit vague - do you mean that B and C are simply access points?
If all three are access points in the same general area, so it's likely that a user might roam from B to C, then you should use bridging.

You can use A as a centralized DHCP server if B and C are routed - just configure B and C with DHCP relay instead of DHCP server and configure 3 DHCP servers on A - and 3 scopes / address pools. I don't think this is what you want, though, given your statement that clients with 7.x can't work when they connect to 8.x - they would need to release their address and receive a new one from the other network. That's just how routing is supposed to work, so if it's not ideal for your installation, then you should bridge this.

Now - if there's some other infrastructure between A-B, and between A-C and you need THIS to be routed, then you could use some tunneling protocol like EoIP between A-B and A-C and bridge the two tunnels at A. On B and C, you would bridge the "common" segment to the EoIP and leave the routed interface there to route the EoIP packets.

Your suggestion helps thanks. To clear up the vagueness.

A is the base B and C are miles away connected with a wireless backhaul. Customers are use CPE's but signal from both B and C overlap in some areas.
Between C)-----(A)------(B is just a wireless link. Will try the dhcp relay.

Since you're using CPE, you could set up your network to use tunnels from the CPE to the A router, and bridge the CPE's LAN interface to the tunnel interface, and give customer routers DHCP inside the tunnel.

Thank you for this post it was really helpful.