Final answer:
The number of MRs allowed on a server during a shift change depends on the specific server's policies or system rules. Without context, an accurate answer cannot be given, as server management differs. To find the precise number, consulting the specific server or system documentation or rules is necessary.
Step-by-step explanation:
The question regarding how many MRs (Maintenance Roles or Moderator Roles, depending on context) can be in a server during a shift change is not straightforward as it seems to relate to the specific policies of a particular server or system, which are not clarified in the question. Generally speaking, server management allows for various numbers of administrators or moderators, and this is typically determined by the server's rules or by a software's functionality.
Without specific context related to a particular system or server, an accurate answer cannot be given. If this is related to a particular game, software platform, or administrative management system, the respective documentation or rules should be consulted for a precise answer. In contexts where moderation is necessary, it is common to see multiple moderators online to ensure smooth operations during role transitions or shift changes.