<div class="content"><p> </p><p>The NspiDNToMId method maps a set of <span><a href="1b8009c5-72bc-41da-bbab-612b31da4410#gt_1175dd11-9368-41d5-98ed-d585f268ad4b" data-linktype="relative-path">DN</a></span>
to a set of <span><a href="1b8009c5-72bc-41da-bbab-612b31da4410#gt_42ecf4ed-a7e5-4044-a1f0-f67ca58fb4b6" data-linktype="relative-path">MId</a></span>.</p><dl>
<dd>
<div><pre> long NspiDNToMId(
   [in] NSPI_HANDLE hRpc,
   [in] DWORD Reserved,
   [in] StringsArray_r* pNames,
   [out] PropertyTagArray_r** ppOutMIds
 );
</pre></div>
</dd></dl><p><b>hRpc: </b> An <span><a href="1b8009c5-72bc-41da-bbab-612b31da4410#gt_8a7f6700-8311-45bc-af10-82e10accd331" data-linktype="relative-path">RPC</a></span> context handle
as specified in section <span><a href="67195f6a-2002-4d81-b279-ba8b0aefb4af" data-linktype="relative-path">2.3.9</a></span>.</p><p><b>Reserved: </b>A <span><a href="../ms-dtyp/262627d8-3418-4627-9218-4ffe110850b2" data-linktype="relative-path">DWORD</a></span>
value reserved for future use. Ignored by the server.</p><p><b>pNames: </b>A <span><a href="2c7ac29c-0124-464e-a018-16950cfcfabb" data-linktype="relative-path">StringsArray_r</a></span>
value. It holds a list of strings containing DNs, according to <span><a href="/en-us/openspecs/exchange_server_protocols/MS-OXOABK/f4cf9b4c-9232-4506-9e71-2270de217614" data-linktype="absolute-path">[MS-OXOABK]</a></span>.</p><p><b>ppOutMIds: </b>A <span><a href="9dc42856-90da-4df9-85ca-f8307db84659" data-linktype="relative-path">PropertyTagArray_r</a></span>
value. On return, it holds a list of MIds.</p><p><b>Return Values: </b>The server returns a long value
specifying the return status of the method.</p><p>Exceptions Thrown</p><p>No exceptions are thrown beyond those thrown by the
underlying RPC protocol, as specified in <span><a href="../ms-rpce/290c38b1-92fe-4229-91e6-4fc376610c15" data-linktype="relative-path">[MS-RPCE]</a></span>.</p><p>Server Processing Rules</p><p>Upon receiving this message, the server MUST process the
data from the message subject to the following constraints: </p><ol><li><p><span>    </span>If the server
returns any return value other than Success, the server MUST return the value
NULL in the return parameter <i>ppOutMIds</i>.</p>
</li><li><p><span>    </span>The server MAY
make additional validations as described in <span><a href="39bcbcd7-fa18-4eb2-a2ae-c598b6683185" data-linktype="relative-path">Security (section 5)</a></span>.
If the server chooses to limit the visibility of data based on these
validations, the server MUST proceed as if that data did not exist in the
address book. See the product behavior note cited in section <span><a href="36c0f768-1fdd-4709-9875-6c387b107560" data-linktype="relative-path">5.1</a></span>
for more information.</p>
</li><li><p><span>    </span>If the server is
unable to locate an appropriate mapping between a DN and a MId, it MUST map the
DN to a MId with the value 0.</p>
</li><li><p><span>    </span>The server
constructs a list of MIds to return to the client, encoding the mappings. The
list is in a one-to-one order preserving correspondence with the list of DNs in
the input parameter <i>pNames</i>. The server MUST return the list in the
output parameter <i>ppOutMIds</i>.</p>
</li><li><p><span>    </span>If no other
return values have been specified by these constraints, the server MUST return
the return value Success.</p>
</li></ol></div>