Hi Vikram, should be able to use following option:
-----------------------------------------
contact.history.filters-<custom attribute>Modified: 8.5.104.15Default Value: ""
Valid Values: In the key, a valid searchable interaction attribute name. In the value, a comma-separated list of strings applicable to the specified interaction attribute. Use the $All$ and $Other$ keywords to enable filtering on "all" or "other" values for this attribute.
Changes take effect: At the next contact search.
Description: This option can be used as a template to specify an interaction attribute name (in a key) and the associated values (in a value) that is used to automatically filter any list of interactions displayed in Contact History, My History, and Global Interaction Search views. Refer to Managing Contacts for more information. In a key, a valid searchable interaction attribute name. In a value, a comma-separated list of strings that are applicable to the specified interaction attribute. In the value, a comma-separated list of strings applicable to the specified interaction attribute. Use the $All$ and $Other$ keywords to enable filtering on "all" or "other" values for this attribute.
---------------------------------------------
for example, contact.history.filters-InteractionSubType. However you need to add seetings and is-searchable = true in annex of interaction attrbiute but where it's a system parameter you cannot modify it, so would recommend to open a case so we can investigate further.
Thanks
Brian