Presence server: a "Presence server" provides the services to collect, manage and distribute the real time availability and the means for communicating among users.

在线状态服务器：“在线状态服务器”提供用于收集、管理和分发实时可用性和用户间的通信方法的服务。

youdao

Users and services can subscribe to the presence and capabilities of another user or group of users.

用户和服务可以订阅另一个用户或用户组的存在情况和功能。

youdao

Nearly all businesses have or are creating a presence on the web to promote or sell their products and services, find new customers, or support existing ones.

几乎所有的企业都已经或正在网上建立自己的站点：推广或销售其产品和服务、寻找新客户、或者为现有的客户提供支持。

youdao

In June 2012, it acquired White Glove Technologies, a Texas-based managed IT services provider, in an effort to strengthen its presence in the cloud services industry and expand its managed IT services in Texas.

FORBES: Why Best Buy Is Still Worth $25

The company is working on expanding offline presence of its payment services to drive future growth.

FORBES: All Around Strong Performance Caps A Great Year For eBay

Your domain can't have a Web or e-mail presence unless it's hosted--though your registrar may provide some hosting services for a Web presence and e-mail account at a reasonable cost (or gratis).

CNN: How to get your own domain name