<div class="content" name="ModifyMachineGroup" uuid="0dc220fd-bfe8-4da3-acc5-2b9fc79d8f1a"><p>The ModifyMachineGroup method modifies an existing machine
group. The method replaces or merges the machine group information according to
the value specified in the <b>enumMGMergeOptions</b> member. </p><dl>
<dd>
<div><pre> [id(3), helpstring(&#34;method ModifyMachineGroup&#34;)] HRESULT ModifyMachineGroup(
   [in] BSTR bstrMachineGroupId,
   [in] BSTR bstrMachineGroupInfo,
   [in] MACHINE_GROUP_MERGE_OPTIONS enumMGMergeOptions
 );
</pre></div>
</dd></dl><p><b>bstrMachineGroupId: </b>A string that specifies
the identifier of the machine group to be modified.</p><dl>
<dd>
<p>If this parameter is NULL, <b>E_INVALIDARG</b> MUST
be returned.</p>
</dd></dl><p><b>bstrMachineGroupInfo: </b>A string that specifies
the new information for the machine group, in the format specified in <a href="d137388f-8b86-4a30-8848-7ffb6029f276" data-linktype="relative-path">MachineGroup</a> element
(section <a href="9c604cb0-5522-4dc6-a479-e1ea2578c3ba" data-linktype="relative-path">2.2.5.18</a>).</p><dl>
<dd>
<p>If this parameter is NULL, <b>E_INVALIDARG</b> MUST
be returned.</p>
</dd></dl><p><b>enumMGMergeOptions: </b>Options for machine group
modification, from the <a href="77ef0d38-39f3-4bdf-bd65-c36725c669d2" data-linktype="relative-path">MACHINE_GROUP_MERGE_OPTIONS</a>
enumeration (section 2.2.3.4).<a id="Appendix_A_Target_89"></a><a aria-label="Product behavior note 89" href="1af5b971-a682-44a0-affe-c98947d5e7f7#Appendix_A_89" data-linktype="relative-path">&lt;89&gt;</a></p><p><b>Return Values: </b>This method returns 0x00000000
for success or a negative <a href="e371cc74-bf4c-4870-8afe-5062cc628b4f#gt_799103ab-b3cb-4eab-8c55-322821b2b235" data-linktype="relative-path">HRESULT</a>
value (in the following table or in <a href="../ms-erref/1bc92ddf-b79e-413c-bbaa-99a5281a6c90" data-linktype="relative-path">[MS-ERREF]</a>
section <a href="../ms-erref/705fb797-2175-4a90-b5a3-3918024b10b8" data-linktype="relative-path">2.1.1</a>)
if an error occurs.</p><dl>
<dd>
<table><thead>
  <tr>
   <th>
   <p>Return value/code</p>
   </th>
   <th>
   <p>Description</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>0x00000000 S_OK</td>
  <td>Operation successful.</td>
 </tr><tr>
  <td>0x80070057 E_INVALIDARG</td>
  <td>One or more arguments are invalid.&lt;90&gt;</td>
 </tr><tr>
  <td>0xC1FF0070 WRM_ERR_TAGS_NOT_IN_ORDER</td>
  <td>The XML data that is maintained by the management service is invalid or cannot be processed.&lt;91&gt;</td>
 </tr><tr>
  <td>0xC1FF0385 WRM_ERR_MACHINE_GROUP_LIMIT_EXCEEDED</td>
  <td>The total number of machine groups as specified in bstrMachineGroupInfo, has exceeded an implementation-defined limit.&lt;92&gt;</td>
 </tr><tr>
  <td>0xC1FF0387 WRM_ERR_MACHINES_LIMIT_IN_MACHINEGROUP_EXCEEDED</td>
  <td>The machine group information could not be modified because the total number of machines directly under a machine group has exceeded an implementation-defined limit.&lt;93&gt;</td>
 </tr><tr>
  <td>0xC1FF0388 WRM_ERR_MACHINEGROUP_ALREADY_EXISTS</td>
  <td>A machine group with the specified name in bstrMachineGroupInfo XML already exists in the entire WSRM configuration. For example, if ModifyMachineGroup is used to modify a machine group ID that is identical to the existing group ID, this error will be generated.&lt;94&gt;</td>
 </tr><tr>
  <td>0xC1FF0389 WRM_ERR_MACHINEGROUPID_INVALID</td>
  <td>The specified machine group ID is invalid.</td>
 </tr></tbody></table>
</dd></dl><p>Additional <a href="959a6150-11e3-44ec-b6cd-78da5b2c9e00" data-linktype="relative-path">IWRMMachineGroup</a> interface
methods are specified in section 3.2.4.6.</p></div>