2472319 - SQL Error 10011: Access Denied during upgrade

Updating the SAP NetWeaver system (SUM tool) from SAP NW 7.4/Support Package Stack (SPS) 14 to 16 fails and returns following error message in phase:
MAIN_SWITCH/SQLDB_MSS_MSSPROCSTHROW:

SAPup> Starting subprocess in phase 'SQLDB_MSS_MSSPROCSTHROW' at 20170511024501
ENV: DBMS_TYPE=mss
ENV: PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
ENV: PATH=D:\usr\sap\SUM\abap\bin;C:\Perl\bin\;C:\Program Files\EMC\PowerCommon\;C:\Program Files\EMC\PowerPath\;C:\Program Files\EMC\PowerPath\32bit\;C:\Program Files\EMC\RSA\CST\lib\;C:\Program Files\HP\NCU;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\System Center Operations Manager 2007\;C:\Program Files (x86)\Microsoft SQL Server\110\Tools\Binn\;C:\Program Files\Microsoft SQL Server\110\Tools\Binn\;C:\Program Files\Microsoft SQL Server\110\DTS\Binn\;C:\Program Files\Veritas\NetBackup\bin;C:\Program Files\SAP\hdbclient\;C:\Program Files\Puppet Labs\Puppet\bin;D:\usr\sap\TI0\DVEBMGS00\exe;D:\usr\sap\TI0\SYS\exe\uc\NTAMD64
ENV: RSEC_SSFS_DATAPATH=\\fmsap350\sapmnt\TI0\SYS\global\security\rsecssfs\data
ENV: RSEC_SSFS_KEYPATH=\\fmsap350\sapmnt\TI0\SYS\global\security\rsecssfs\key
ENV: SAPSYSTEMNAME=TI0
*DBENV: dbs_mss_schema=ti0
ENV: rsdb_ssfs_connect=0
*DBENV: (auth_shadow_upgrade)
PWD: D:\usr\sap\SUM\abap\tmp

EXECUTING D:\usr\sap\SUM\abap\bin\SAPuptool.EXE execdb ..\var\SQLDBSCRIPT.TQL
Logging to 'D:\usr\sap\SUM\abap\log\SQLDBSCRIPT.OUT'
1EETQ008 Error message: DBSL error 99 (db code 50000):
1EETQ009XCreation of stored procedure 'sap_droproc' threw SQL Error 10011: Access
1EETQ009Xdenied.
1EETQ003 exit code: "20"
SAPup> Process with PID 17540 terminated with status 20 at yyyymmddhhmmss!

SAP NetWeaver on Microsoft SQL Server

OS, antivirus, anti virus, defender, SUM, MAIN_SWITCH/SQLDB_MSS_MSSPROCSTHROW SQLDBSCRIPT.TQL SQL Error 10011 Access denied , KBA , BC-DB-MSS , SQL Server in SAP NetWeaver Products , Problem