Does Allaah come downto the first heaven on the night of the fifteenth of Sha’baan?

Does Allaah come down to the first heaven on the night of the
fifteenth of Sha'baan and forgive all the people except two types,
namely kaafirs and those engaged in disputes?.
Praise be to Allaah.
This is mentioned in someahaadeeth, but there is some scholarly
difference of opinion as to the soundness of those ahaadeeth. There is
no saheeh hadeeth concerning the virtue of the night of the fifteenth
of Sha'baan.
It was narrated from Abu Moosa al-Ash'ari that the Messenger of Allaah
(peace and blessings of Allaah be upon him) said: "Allaah looks down
on thenight of the fifteenth of Sha'baan and forgives all his creation
except a mushrik or one who harbours hatred against the Muslims."
Narrated by Ibn Maajah, 1390.
The "one who harbours hatred against the Muslims" means one who has
enmity towards a Muslim brother.
In al-Zawaa'id it says: Its isnaad is da'eef, because 'Abd-Allaah ibn
Lahee'ah is da'eef (weak) and al-Waleed ibn Muslim is mudallis.
There is also some idtiraab (weakness) in thehadeeth, as stated by
al-Daaraqutni in al-'Ilal, 6/50, 51. He said: This hadeeth is not
proven.
It was narrated from Mu'aadh ibn Jabal, 'Aa'ishah, Abu Hurayrah, Abu
Tha'labah al-Khushaniand others, but the isnaads are not free of some
weakness, and some of them are very weak.
Ibn Rajab al-Hanbali said:
Concerning the virtue of the night of the fifteenth of Sha'baan there
are numerous ahaadeeth, concerning which the scholars differed, but
most of them classed them as da'eef, and Ibn Hibbaan classed some of
them as saheeh.
Lataa'if al-Ma'aazif, 261.
Allaah's descending to thefirst heaven does not onlyhappen on the
night of the fifteenth of Sha'baan, rather it is proven in
al-Saheehayn and elsewhere that Allaah descends to the first heaven
every night, in thelast third of the night. Thenight of the fifteenth
of Sha'baan is included in this general meaning.
Hence, when 'Abd-Allaah ibn al-Mubaarak was asked about the descent of
Allaah on the night of the fifteenth of Sha'baan, he said to the one
who asked him: "O weak one! The night of the fifteenth?! He descends
every night!"
Narrated by Abu 'Uthmaan al-Saabooni in I'tiqaad Ahl al-Sunnah, no.92.
Al-'Aqeeli (may Allaah have mercy on him) said:
With regard to Allaah's descending on the night of the fifteenth of
Sha'baan there are ahaadeeth which are weak, but the reports thatHe
descends every night are proven and saheeh, sothe night of the
fifteenth of Sha'baan is included in that, in sha Allaah.
Al-Du'afa', 3/29.
See also the answer to question no. 8907 .
On this site you can also find an article by Shaykh Ibn Baz (may
Allaah have mercy on him) concerningthe ruling on celebrating the
night of the fifteenth of Sha'baan.