You might stop propagating a content index if, for example, you lose your network connection or if the propagation is taking an exceedingly long time.
Propagation of indexes containing a large number of documents takes longer than propagation of indexes containing fewer documents. The time for propagation also depends on the network connection to the search servers.
Indexes are propagated to all search servers. If you stop propagation of an index, you will not be able to see it on any search server, unless you stopped the propagation after it was successful on some servers but not on others. When this occurs, the propagation page will show that the propagation was successful, but with errors on specific servers.
For more information about search content propagation, see About Search Content Propagation.
Note Once you stop propagation, you cannot resume it. However, you can propagate the index again. For more information, see Propagating a Content Index.