The UMMOA's current diplomatic status

Someone has asked me whether or not any sovereign state, even state with limited recognition, has ever recognised the United Micronations Multi-Oceanic Archipelago (UMMOA™).

The answer is yes — the UMMOA has been recognised. Cabinda (or Kabinda) is considered a de facto state, and it has recognised the UMMOA in the past:

Here is some direct evidence that the Republic of Cabinda is in the Wikipedia's  "unrecognized or largely unrecognized states" category:

By the way, I'm also the Interim Deputy Minister of Information for the Republic of Cabinda, so the relationship between the UMMOA and Cabinda is far from superficial. Cabinda is also a former member of the Unrepresented Nations and Peoples Organization (UNPO).

The UMMOA is also recognised by an international organisation to which Cabinda is a member, the Organization of Emerging African States (OEAS), and since this organisation has at least one de facto state among its members, you can say that the UMMOA is also recognised by a young, but nonetheless real IGO (intergovernmental organisation). The OEAS recognises the UMMOA as a state, and in fact it specifically recognises the UMMOA's claim to 11 Red Sea and Indian Ocean disputed insular territories, and also recognises the UMMOA as Protector, not Governor, of Mayotte and the Chagos Archipelago.

Another member of the OEAS also recognises at least one UMMOA Red Sea territorial claim, the Government of Southern Cameroons. Southern Cameroons is also represented in the UNPO by the Southern Cameroons National Council. Another name for Southern Cameroons is Ambazonia, or British Southern Cameroons, and the United Nations has recognised Ambazonia as a sovereign nation under the illegal occupation, a status similar to that of Hawaii or Tibet. So the UMMOA is also recognised by a sovereign nation.

The UMMOA has also been treated like any other subject of international law by the International Criminal Court (ICC) in the past, and this permanent international tribunal has also confirmed, in de facto manner, the UMMOA's role as Protector of the Chagos Archipelago.

The UMMOA is also recognised by Chamber of Computer Logistics People Worldwide (CCLP Worldwide), an India-based NGO which has Special Consultative Status with the United Nations Economic and Social Council (ECOSOC).

In the files of a recently amended trademark, the United Micronations Multi-Oceanic Archipelago (UMMOA™) has been described by a United States Patent and Trademark Office (USPTO) examining attorney as indicating "membership in a political organization concerned with international affairs", so the UMMOA wordmark has not been registered by the United States Patent and Trademark Office (USPTO) yet, but the wordmark has been approved for publication, and is in good standing:

This is not recognition by the United States Department of State (often referred to as the "State Department"), the US federal executive department responsible for international relations, and equivalent to the foreign ministry of other countries. It is, however, quasi-recognition by an agency of a US federal executive department — a UMMOA® or UMMOA registered trademark would be real recognition in this case.

Finally, the US Department of the Interior, the US federal executive department responsible for programs relating to American Indians, Alaska Natives, Native Hawaiians, territorial affairs, and insular areas of the United States, has publicly refused to recognise the UMMOA's claim to 11 Pacific Ocean and Caribbean Sea disputed insular territories also claimed by the United States:

So you can say that the United Micronations Multi-Oceanic Archipelago (UMMOA™) is neither your typical micronation, nor your typical unrecognised state  or state with limited recognition.
HMRD Cesidio Tallini [1, 2]
UMMOA Foreign Ministry