Being the masochist that I am, I have already started testing imaging configs based on 10.10.3. As part of our provisioning process, we have an AppleScript-based app that, among other things, runs a command that creates a mobile account on the system using an AD account.

Binary location:
/System/Library/CoreServices/ManagedClient.app/Contents/Resources/createmobileaccount

Sample script:
createmobileaccount -n bmarks

Up until 10.10.3, this command (as part of a much larger script) would successfully create a mobile user. However, as of 10.10.3, this doesn't work and the following output is what happens if I run this command manually. Any help would be greatly appreciated.

bash-3.2# ./createmobileaccount -n bmarks

createmobileaccount built Mar 4 2015 21:45:09

2015-04-08 16:58:16.640 createmobileaccount[2090:16297] ### syncProxyWithSemaphore error:Error Domain=NSCocoaErrorDomain Code=4097 "Couldn’t communicate with a helper application." (connection to service named com.apple.systemadministration.writeconfig) UserInfo=0x7fda2c0035e0 {NSDebugDescription=connection to service named com.apple.systemadministration.writeconfig}

2015-04-08 16:58:16.933 createmobileaccountn2090:16291] MCXCCacheMCXRecordAndGraph(): vproc_swap_integer(NULL, VPROC_GSK_PERUSER_SUSPEND, &(uid=282448354), NULL) failed

2015-04-08 16:58:17.459 createmobileaccountn2090:16291] MCXCCacheMCXRecordAndGraph(): vproc_swap_integer(NULL, VPROC_GSK_PERUSER_RESUME, &(uid=282448354), NULL) failed

2015-04-08 16:58:17.732 createmobileaccountn2090:16360] ### syncProxyWithSemaphore error:Error Domain=NSCocoaErrorDomain Code=4097 "Couldn’t communicate with a helper application." (connection to service named com.apple.systemadministration.writeconfig) UserInfo=0x7fda2a609520 {NSDebugDescription=connection to service named com.apple.systemadministration.writeconfig}

2015-04-08 16:58:17.732 createmobileaccounto2090:16291] MCXCCreateMobileAccount(): Failed to create account. Error = -6304 (mobile account file path is either not a directory or could not be properly created). Cleaning up mobile account record.

2015-04-08 16:58:17.735 createmobileaccounto2090:16292] ### syncProxyWithSemaphore error:Error Domain=NSCocoaErrorDomain Code=4097 "Couldn’t communicate with a helper application." (connection to service named com.apple.systemadministration.writeconfig) UserInfo=0x7fda2a60c0d0 {NSDebugDescription=connection to service named com.apple.systemadministration.writeconfig}

2015-04-08 16:58:17.737 createmobileaccountc2090:16291] MCXCDeleteAccount(): vproc_swap_integer(NULL, VPROC_GSK_PERUSER_SUSPEND, &(uid=282448354), NULL) failed

2015-04-08 16:58:17.738 createmobileaccountc2090:16359] ### syncProxyWithSemaphore error:Error Domain=NSCocoaErrorDomain Code=4097 "Couldn’t communicate with a helper application." (connection to service named com.apple.systemadministration.writeconfig) UserInfo=0x7fda2a60c100 {NSDebugDescription=connection to service named com.apple.systemadministration.writeconfig}

2015-04-08 16:58:17.761 createmobileaccounte2090:16359] ### syncProxyWithSemaphore error:Error Domain=NSCocoaErrorDomain Code=4097 "Couldn’t communicate with a helper application." (connection to service named com.apple.systemadministration.writeconfig) UserInfo=0x7fda2a551070 {NSDebugDescription=connection to service named com.apple.systemadministration.writeconfig}

2015-04-08 16:58:17.761 createmobileaccounti2090:16291] MCXCDeleteAccount(): vproc_swap_integer(NULL, VPROC_GSK_PERUSER_RESUME, &(uid=282448354), NULL)failed

* mobile account could not be created: -6304 (MCXCCreateMobileAccount(): cnewUser createHomeDirectory] failed)