No joy on those changes to the json loginserver section resolving my issue. Still having UCS crashes. It seems to fail before or at the point of checking the key with the DB specifically in the Database::VerifyMailKey function. Enabled DB query logging and updated log below. In the DB the mailkey is shown as 7100000A0BA648B3.
[02-01-2019 :: 11:04:47] [MySQL Query] SELECT `value` FROM `variables` WHERE `varname` = 'RuleSet' (0 rows returned)
[02-01-2019 :: 11:04:47] [MySQL Query] SELECT ruleset_id FROM rule_sets WHERE name='default' (1 row returned)
[02-01-2019 :: 11:04:47] [MySQL Query] SELECT rule_name, rule_value FROM rule_values WHERE ruleset_id=1 (620 rows returned)
[02-01-2019 :: 11:04:47] [UCS Server] Loaded default rule set 'default'
[02-01-2019 :: 11:04:47] [UCS Server] Initialized dynamic dictionary entries
[02-01-2019 :: 11:04:47] [UCS Server] Expiring mail...
[02-01-2019 :: 11:04:47] [MySQL Query] SELECT COUNT(*) FROM `mail` (1 row returned)
[02-01-2019 :: 11:04:47] [UCS Server] There are 0 messages in the database.
[02-01-2019 :: 11:04:47] [MySQL Query] DELETE FROM `mail` WHERE `status`=4 AND `timestamp` < 1549037087 (0 rows affected)
[02-01-2019 :: 11:04:47] [UCS Server] Expired 0 trash messages.
[02-01-2019 :: 11:04:47] [MySQL Query] DELETE FROM `mail` WHERE `status` = 3 AND `timestamp` < 1517501087 (0 rows affected)
[02-01-2019 :: 11:04:47] [UCS Server] Expired 0 read messages.
[02-01-2019 :: 11:04:47] [MySQL Query] DELETE FROM `mail` WHERE `status`=1 AND `timestamp` < 1517501087 (0 rows affected)
[02-01-2019 :: 11:04:47] [UCS Server] Expired 0 unread messages.
[02-01-2019 :: 11:04:47] [UCS Server] Loading chat channels from the database.
[02-01-2019 :: 11:04:47] [MySQL Query] SELECT `name`, `owner`, `password`, `minstatus` FROM `chatchannels` (0 rows returned)
[02-01-2019 :: 11:06:08] [UCS Server] Connection type is Combined (RoF2)
[02-01-2019 :: 11:06:08] [UCS Server] Received login for user SOE.EQ.!The King's Lair (Solo Tuned EQEmu Server).Poka with key 0BA648B3
[02-01-2019 :: 11:06:08] [MySQL Query] SELECT `mailkey` FROM `character_data` WHERE `name`='Poka' LIMIT 1 (0 rows returned)
[02-01-2019 :: 11:06:08] [Crash] EXCEPTION_ACCESS_VIOLATION
[02-01-2019 :: 11:06:08] [Crash] SymInit: Symbol-SearchPath: '.;C:\EQEmuServer;C:\EQEmuServer;C:\WINDOWS;C:\WIN DOWS\system32;SRV*C:\websymbols*
http://msdl.microsoft.com/download/symbols;', symOptions: 530, UserName: 'Giles King'
[02-01-2019 :: 11:06:08] [Crash] OS-Version: 6.2.9200 () 0x300-0x1
[02-01-2019 :: 11:06:08] [Crash] C:\EQEmuServer\ucs.exe:ucs.exe (000B0000), size: 1818624 (result: 0), SymType: 'PDB', PDB: 'C:\EQEmuServer\ucs.exe'
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\SYSTEM32\ntdll.dll:ntdll.dll (77210000), size: 1638400 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\SYSTEM32\ntdll.dll', fileVersion: 6.2.17134.471
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\KERNEL32.DLL:KERNEL32.DLL (73710000), size: 917504 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\KERNEL32.DLL', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\KERNELBASE.dll:KERNELBASE.dll (75DE0000), size: 1982464 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\KERNELBASE.dll', fileVersion: 6.2.17134.441
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\WS2_32.dll:WS2_32.dll (766F0000), size: 421888 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\WS2_32.dll', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\RPCRT4.dll:RPCRT4.dll (769E0000), size: 786432 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\RPCRT4.dll', fileVersion: 6.2.17134.471
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\SspiCli.dll:SspiCli.dll (73280000), size: 131072 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\SspiCli.dll', fileVersion: 6.2.17134.376
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\CRYPTBASE.dll:CRYPTBASE.dll (73270000), size: 40960 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\CRYPTBASE.dll', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\bcryptPrimitives.dll:bcryptPri mitives.dll (73CC0000), size: 360448 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\bcryptPrimitives.dll', fileVersion: 6.2.17134.471
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\sechost.dll:sechost.dll (76760000), size: 278528 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\sechost.dll', fileVersion: 6.2.17134.319
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\PSAPI.DLL:PSAPI.DLL (765D0000), size: 24576 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\PSAPI.DLL', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\USER32.dll:USER32.dll (73A80000), size: 1626112 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\USER32.dll', fileVersion: 6.2.17134.376
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\win32u.dll:win32u.dll (75FD0000), size: 94208 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\win32u.dll', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\GDI32.dll:GDI32.dll (75AD0000), size: 139264 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\GDI32.dll', fileVersion: 6.2.17134.285
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\gdi32full.dll:gdi32full.dll (76ED0000), size: 1458176 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\gdi32full.dll', fileVersion: 6.2.17134.471
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\msvcp_win.dll:msvcp_win.dll (76960000), size: 512000 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\msvcp_win.dll', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\ucrtbase.dll:ucrtbase.dll (735F0000), size: 1171456 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\ucrtbase.dll', fileVersion: 6.2.17134.319
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\ADVAPI32.dll:ADVAPI32.dll (73D20000), size: 491520 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\ADVAPI32.dll', fileVersion: 6.2.17134.471
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\msvcrt.dll:msvcrt.dll (73E00000), size: 782336 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\msvcrt.dll', fileVersion: 7.0.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\EQEmuServer\LIBMYSQL.dll:LIBMYSQL.dll (64530000), size: 2924544 (result: 0), SymType: '-exported-', PDB: 'C:\EQEmuServer\LIBMYSQL.dll'
[02-01-2019 :: 11:06:08] [Crash] C:\EQEmuServer\zlib1.dll:zlib1.dll (731A0000), size: 90112 (result: 0), SymType: '-exported-', PDB: 'C:\EQEmuServer\zlib1.dll', fileVersion: 1.2.11.0
[02-01-2019 :: 11:06:08] [Crash] C:\EQEmuServer\libsodium.dll:libsodium.dll (72570000), size: 307200 (result: 0), SymType: '-exported-', PDB: 'C:\EQEmuServer\libsodium.dll', fileVersion: 1.0.16.0
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\SYSTEM32\IPHLPAPI.DLL:IPHLPAPI.DLL (72DC0000), size: 196608 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\SYSTEM32\IPHLPAPI.DLL', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\SYSTEM32\USERENV.dll:USERENV.dll (720E0000), size: 135168 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\SYSTEM32\USERENV.dll', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\profapi.dll:profapi.dll (73CA0000), size: 98304 (result: 0), SymType: '-nosymbols-', PDB: 'C:\WINDOWS\System32\profapi.dll', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\SYSTEM32\VERSION.dll:VERSION.dll (73170000), size: 32768 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\SYSTEM32\VERSION.dll', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\SYSTEM32\VCRUNTIME140.dll:VCRUNTIME140. dll (72550000), size: 86016 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\SYSTEM32\VCRUNTIME140.dll', fileVersion: 14.13.26020.0
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\IMM32.DLL:IMM32.DLL (75C00000), size: 155648 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\IMM32.DLL', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\system32\napinsp.dll:napinsp.dll (72080000), size: 69632 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\system32\napinsp.dll', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\system32\pnrpnsp.dll:pnrpnsp.dll (72060000), size: 90112 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\system32\pnrpnsp.dll', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\system32\NLAapi.dll:NLAapi.dll (72040000), size: 77824 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\system32\NLAapi.dll', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\mswsock.dll:mswsock.dll (73110000), size: 352256 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\mswsock.dll', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\SYSTEM32\DNSAPI.dll
NSAPI.dll (72A00000), size: 581632 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\SYSTEM32\DNSAPI.dll', fileVersion: 6.2.17134.441
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\NSI.dll:NSI.dll (73A70000), size: 28672 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\NSI.dll', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\winrnr.dll:winrnr.dll (72030000), size: 49152 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\winrnr.dll', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\wshbth.dll:wshbth.dll (72010000), size: 69632 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\wshbth.dll', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\Windows\System32\rasadhlp.dll:rasadhlp.dll (729F0000), size: 32768 (result: 0), SymType: '-exported-', PDB: 'C:\Windows\System32\rasadhlp.dll', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\fwpuclnt.dll:fwpuclnt.dll (729A0000), size: 323584 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\fwpuclnt.dll', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\SYSTEM32\bcrypt.dll:bcrypt.dll (730A0000), size: 102400 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\SYSTEM32\bcrypt.dll', fileVersion: 6.2.17134.112
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\powrprof.dll:powrprof.dll (770D0000), size: 282624 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\powrprof.dll', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\System32\kernel.appcore.dll:kernel.appc ore.dll (75580000), size: 61440 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\System32\kernel.appcore.dll', fileVersion: 6.2.17134.112
[02-01-2019 :: 11:06:08] [Crash] C:\WINDOWS\SYSTEM32\dbghelp.dll:dbghelp.dll (70070000), size: 1581056 (result: 0), SymType: '-exported-', PDB: 'C:\WINDOWS\SYSTEM32\dbghelp.dll', fileVersion: 6.2.17134.1
[02-01-2019 :: 11:06:08] [Crash] c:\projects\eqemu\common\mysql_request_row.cpp (73): MySQLRequestRow::operator[]
[02-01-2019 :: 11:06:09] [Crash] c:\projects\eqemu\ucs\database.cpp (19
: Database::VerifyMailKey
[02-01-2019 :: 11:06:09] [Crash] c:\projects\eqemu\ucs\clientlist.cpp (636): Clientlist::Process
[02-01-2019 :: 11:06:09] [Crash] c:\projects\eqemu\ucs\ucs.cpp (153): main
[02-01-2019 :: 11:06:09] [Crash] d:\agent\_work\2\s\src\vctools\crt\vcstartup\src\s tartup\exe_common.inl (28
: __scrt_common_main_seh
[02-01-2019 :: 11:06:09] [Crash] ERROR: SymGetLineFromAddr64, GetLastError: 487 (Address: 73728484)
[02-01-2019 :: 11:06:09] [Crash] 73728484 (KERNEL32): (filename not available): BaseThreadInitThunk
[02-01-2019 :: 11:06:09] [Crash] ERROR: SymGetLineFromAddr64, GetLastError: 487 (Address: 77273AB
[02-01-2019 :: 11:06:09] [Crash] 77273AB8 (ntdll): (filename not available): RtlAreBitsSet
[02-01-2019 :: 11:06:09] [Crash] ERROR: SymGetLineFromAddr64, GetLastError: 487 (Address: 77273A8
[02-01-2019 :: 11:06:09] [Crash] 77273A88 (ntdll): (filename not available): RtlAreBitsSet