Which of the following statements is true about the 3CX Instance Manager?

The statement about the 3CX Instance Manager supporting batch updates across multiple instances is accurate. This functionality is a key feature of the 3CX Instance Manager, as it allows administrators to manage several instances of 3CX from a single interface, streamlining tasks such as updates and security patches. This capability is particularly beneficial in environments where multiple installations need to be maintained, as it reduces the administrative burden of handling each instance separately.

The other statements are less accurate in describing the 3CX Instance Manager's functionality. For instance, it is not restricted to Windows installations, as it also supports other platforms. Additionally, it can manage more than one instance simultaneously, contradicting any assertion that it is limited to just one at a time. Lastly, while failover modes may be a feature of the overall system architecture for redundancy, the Instance Manager itself does not operate exclusively in this mode. Thus, the assertion about batch updates being supported is an important aspect of its efficiency in managing multiple instances.