WINCC OA DISTRIBUTED SYSTEMS M1/M2 V3.9, EXTENDS A WINCC OA SERVER M1/M2 WITH THE MULTI SERVER OPTION, CONNECTS AUTONOMOUS WINCC OA SYSTEMS. EACH SERVER REQUIRES ONE LICENSE. A MINIMUM OF TWO VALID SERVER LICENSES IS REQUIRED IN A DISTRIBUTED SYSTEM. A REDUNDANT SERVER PAIR REQUIRES 2 LICENSES
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