Availability Set the opening hours and operating systems under which Lync sites and other services will be available. All routine maintenance work affecting service availability must be defined. Define the external factors that affect the service, for example. B loss of connection to the Internet. Office 365, operated by 21Vianet, is a service that is only offered and operated in China. This service is based on technology that Microsoft has licensed to 21Vianet. For more information, see Office 365 operated by 21Vianet. 20.4.1. Calls may be made at premium rates to access third-party content. This content may consist of information services, support services, entertainment, competition or other types of content made available to users of your linked account by third parties.

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