By Walter Glenn, Scott Lowe, Joshua Maher
Get your mission-critical messaging and collaboration platforms up and working with the fundamental consultant to deploying and dealing with trade Server 2007. This accomplished administrator's reference covers the total diversity of server and buyer deployments, unified communications, messaging safeguard, functionality optimization, troubleshooting, and catastrophe restoration. With distinctive emphasis on protection, the head obstacle for messaging directors, this ebook contains chapters on messaging protection, coverage, and instruments and strategies to mitigate e mail viruses, junk mail, and phishing. This booklet grants the definitive information-messaging that pros have to install and function potent, trustworthy, and more-secure messaging and collaboration prone. The better half CD contains a totally searchable e-book and task aids--everything you must support construct firm collaboration options that enhance employee productiveness, store time, and aid decrease IT deployment and administration charges.
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Extra info for Microsoft Exchange Server 2007 Administrators Companion
The domain must be operating in native mode to create security groups with universal scope. You can grant permissions to resources anywhere in the forest to a universal group. Universal group membership must be determined at the time of logon. Because the scope of the universal group is universal, this group is propagated through the Global Catalog. Hence, not only is the group itself propagated in the Global Catalog, but its membership is propagated as well. A universal group with a large membership generates additional replication overhead if the membership changes.
When a message is sent to a mail-enabled group, the message needs to be expanded and individually addressed to each member of the group. By default, the local server performs the expansion and uses LDAP to contact the Global Catalog server to deliver the message to each member of the group. If the message is intended for a local group in the domain, the local Global Catalog server is contacted. If the local server is not available for expansion, another server in the site is used. You can select a specific server in an organization to be an expansion server.
For example, a user in domain A might need access to a color printer located in domain B. Because domain controllers maintain only a replica of objects in their own domain, a special service is needed in the forest to gain access to objects located in remote domains. The Global Catalog server performs this function. This server holds a replica of all objects in the forest, with a limited set of attributes for those objects. The schema defines which attributes are listed for each object in the Global Catalog.